It's been quite a day on the Roland-Garros clay. One former winner goes through, one former champion goes out. There are debut RG semi-finals for Stan Wawrinka and Lucie Safarova while a super-cool Jo-Wilfried Tsonga is back - and back in style. What will tomorrow bring? Join me for a 2pm start on the showcourts. Au revoir.
"I'm just so thrilled," says Ana Ivanovic, who is on the comeback trail at #RG15. The 2008 champion will be hoping to reach another final when she faces Lucie Safarova in Thursday's semi. Read how the popular Serbian seventh seed made it in Matt Trollope's report for Roland-Garros.com.
... but he's happy for his fellow Swiss Stan Wawrinka, who beat him to reach the semi-finals today. "It's my turn to explain myself, and sometimes you don't know what to say," says a defeated Roger Federer. Read the full story in Kate Battersby's report for Roland-Garros.com.
Bravo, Jo! @tsonga7 had the crowd on their feet in #Chatrier after his win over #Nishikori. Watch Match Point: #RG15https://t.co/850IW2vueu
Wednesday's quarter-final line-ups:
Court Philippe-Chatrier from 2pm:Serena Williams (USA)  v Sara Errani (Ita) 
Novak Djokovic (Srb)  v Rafael Nadal (Esp) Court Suzanne-Lenglen from 2pm:Timea Bacsinszky (Sui)  v Alison Van Uytvanck (Bel)
Andy Murray (Gbr)  v David Ferrer (Esp) 
C'est tout! Jo-Wilfried Tsonga is into the semi-finals of his home Grand Slam for the second time - and the first time since 2013. Tsonga kneels down to the clay, covers his eyes with his hands and then raises his arms in celebration. He beat Kei Nishikori 6-1 6-4 4-6 3-6 6-3 to reach the last four.
#Tsonga on song. Takes a 5-2 lead in the fifth. Is it game over for Nishikori or can the #5 seed fight back? #RG15
Tsonga one game from the semis
A big service game from Jo-Wilfried Tsonga. A rip-roaring forehand takes him to 40-0 and he holds with a smash volley at the net. Kei Nishikori can't get a foothold right now. Tsonga is one game away from a place in the final four at #RG15.
#Tsonga gets his 1st break since the 2nd set to take an early 3-1 lead in the 5th. #RG15 http://t.co/muhyt8thFQ
Nishikori 1-6 4-6 6-4 6-3 1-3* Tsonga
The cheers of delight waft their way from Chatrier to Blog HQ. A series of errors from the recently rock-solid Kei Nishikori gift the Frenchman the break. Nishikori double-faults, nets a forehand and then hits long.
Rafel Nadal plays tennis south paw but is actually right-handed. The nine-time champion isn't the only ambidextrous tennis star. Intrigued? We have more in Kate Battersby's special report for Roland-Garros.com.
No.5 seed #Nishikori slides his way into a 5th set. He holds 11-2 five-set record, #Tsonga is 11-6. #RG15 http://t.co/LpoHBGDXIx
Nishikori 1-6 4-6 6-4 6-3 0-0* Tsonga
We are going into a fifth set on Chatrier. Jo-Wilfried Tsonga had a break-point in the ninth game but snuffed it out with a forehand error and Kei Nishikori holds to win the fourth set and send us all into a decider. Do you have more finger nails to nibble? Here we go...
Double vainqueur du tournoi en fauteuil, Stéphane Houdet nous parle de ses ambitions #RG15 http://t.co/BArM3QyTJj
Nishikori 1-6 4-6 6-4 5-2* Tsonga
Kei Nishikori moves to within one game of the fourth set and one game of levelling the match. Jo-Wilfried Tsonga is feeling the frustration - and no wonder because the Japanese player is finding his rhythm out on the clay.
Ca joue et ça rigole sur le 2, comme d'habitude avec M. Barahmi ! #RG15 http://t.co/Hh3QrMlnzk
Nishikori *1-6 4-6 6-4 3-1 Tsonga
Jo-Wilfried Tsonga serves up his first double fault of the match at exactly the wrong time. His error hands Kei Nishikori the break point and when Tsonga sends his forehand beyond the baseline the fifth seed breaks.
Kei Nishikori holds serve as the tension ratches up in the fourth set of his quarter-final against Jo-Wilfried Tsonga. The French 14th seed was 15-40 up on Nishikori but Japan's precision player carves his way through.
Back to Chatrier we go where Kei Nishikori is on the comeback trail against Jo-Wilfried Tsonga. The Japanese fifth seed breaks the Frenchman in the 10th game of the third with a forehand winner. Just what he needed to do to keep himself in the match. We'll be following that fourth set closely now.
Stan Wawrinka is through to the semi-finals of the French Open for the first time. He does it by beating his old sparring partner Roger Federer at a Grand Slam tournament for the first time. The score, 6-4 6-3 7-6 - and 7-4 in the third set tie-break. Federer, the 2009 champion, had just four break point chances against his fellow Swiss but was not able to convert any of them.
Stan Wawrinka holds again to love. Roger Federer is struggling to make any impression on the eighth seed's serve. Stan has hit 35 winners compared to 19 for Federer in this match so far. They're equal on unforced errors with 23 apiece.
The crowd are enjoying a much closer encounter on Chatrier now. It's on serve between Kei Nishikori and Jo-Wilfried Tsonga in the opening exchanges of the third set. And the same applies over on Suzanne-Lenglen, where Stan Wawrinka has a 3-2 lead against Roger Federer, also in the third set.
Lucie Safarova has been talking to the media after booking her place in the semi-finals: "It feels pretty amazing. I haven't digested it yet. It's my first time in the semis here in Paris. I experienced it only once in Wimbledon last year, it's nice to be here so far."
For those eager to know how things stand on Lenglen in the all-Swiss duel, it's on serve in the third set. Federer needs to win this one to stay at #RG15 but the world No.2 has never gone to five sets against Wawrinka.
It's another break for Stan Wawrinka on Suzanne-Lenglen. The eighth seed nudges the line with a beautifully judged forehand winner for set point and Federer flies a backhand wide. Can the 2009 champion fight back?
Just a reminder that we have our first women's semi-final sorted at #RG15. The 2008 champion Ana Ivanovic faces Lucie Safarova on Thursday for a place in the final. Top seed Serena Williams takes on Sara Errani and Timea Bacsinszky faces Alison Van Uytvanck in the remaining quarter-finals tomorrow.
Three big serves from Roger Federer help him save more break points for Stan Wawrinka. Radio Roland Garros contributor Matt Cronin points out that the windy conditions might be troubling Federer, whose game can be easily interrupted by these conditions.
It's Stan Wawrinka who snatches the first set on Suzanne-Lenglen. He saves break point, sending Roger Federer running around the court, and he seals the set when the 17-time Grand Slam champion nets. All done and dusted in 46 minutes.
Did you know, this is the fifth Grand Slam meeting between Stan Wawrinka and compatriot Roger Federer? All of those previous meetings have been won by Federer, who also leads the head-to-head 16-2. They've also met twice before at Roland-Garros, in 2010 and 2011, with Federer winning both those meetings. But...
These are tense times in Kei Nishikori's box as Jo-Wilfried Tsonga roars to the double break in the second set. Nishikori had plenty of time to close out break point but instead he shoves his forehand into the tramlines. The crowd are cheering it up but Tsonga is trying to stay focused, eyes closed.
Super-coach to Roger Federer, Stefan Edberg, is looking cool in his sunnies as he watches his charge hold serve. Edberg, by the way, was a finalist here in 1989 when he was beaten by the record-breaking teenager Michael Chang, who's now in Kei Nishikori's box.
Roger Federer is having a sit-down and a think after being broken by Stan Wawrinka. The eighth seed absolutely motoring at the start of this match, firing a winner down the line for 0-30 and a backhand passing shot to seal the break.
Jo-Wilfried Tsonga is already up a break in the second set. Kei Nishikori is struggling to find any rhythm in this match so far. It's got to be intimidating playing Tsonga in front of a vocal home crowd on Philippe-Chatrier.
Roger Federer opens up the serving on Suzanne-Lenglen against his Swiss Davis Cup team-mate Stan Wawrinka. The Swiss eighth seed - that's Stan by the way - is already hitting at maximum pelt and pushes two break points on the Federer serve before the second seed holds. That's six minutes on the clock - settle in tennis fans.
"I'm so excited. It's tough to describe those feelings. It was amazing today and the first time [into the last four at Roland-Garros] as well. It was very windy out there and the balls were moving, so you had to be really ready." On her semi-final against Ana Ivanovic, she says: "I'm excited and ready."
The Czech 13th seed, Lucie Safarova, backs up her shock win over defending champ Maria Sharapova with a 7-6 6-3 victory over Garbine Muguruza to reach the last four. Safarova books her place in style too, pounding a backhand winner down the line. A few more errors crept into Muguruza's game in the second set and that proved the difference.
Over on Court Suzanne-Lenglen, Lucie Safarova is now a break up against Garbine Muguruza. The Spanish 21st seed double-faulted for break point and handed it over with a forehand error. The Czech edging to the second Grand Slam semi-final of her career.
Kei Nishikori leads the head-to-head against Jo-Wilfried Tsonga 4-1. The French 14th seed is aiming to reach the French Open semi-final for the second time, following his run into the last four in 2013. Nishikori has already notched up his best French Open this season, reaching the quarters for the first time. But the Japanese does have big-match experience, finishing runner-up at the 2014 US Open.
Some last-minute stretches for Jo-Wilfried Tsonga before he is announced. The French 14th seed makes his entrance to cheers from the Chatrier crowd and he responds with a big grin. Kei Nishikori already has his serious game face on as he readies himself. Interesting spot, Jo is wearing a pastel-coloured friendship bracelet on his left wrist. A good luck charm?
"I don't know if I should feel really old or really happy. You guys are just amazing, I had great support." On the windy conditions: "It was really, really tough to play. I was just really happy to serve out the last game." On the huge support in her players' box: "For me it's vital. This is what you go back to in good and bad days."
We have our first Roland-Garros semi-finalist - and it's the familiar face of Ana Ivanovic. The 2008 French Open champion is through with a 6-3 6-2 victory over Elina Svitolina, who was competing in her first Grand Slam quarter-final. We suspect we'll see more from the 20-year-old too. But for now, this is Ivanovic's first semi-final appearance at a major for seven years.
Lucie Safarova's tie-break experience at #RG15 pays off as she storms to the breaker 7-3. The Czech 13th seed grabs the opening set from Garbine Muguruza. But we don't expect this intense encounter to be over yet...
We're loving this big-hitting on Suzanne-Lenglen between Lucie Safarova and Garbine Muguruza. The Spaniard faced break points on her serve but keeps the pressure on Safarova, who pushes her forehand long to see Muguruza hold.
Broadcasting on the entertaining Radio Roland Garros, contributor Craig Gabriel reveals that Lucie Safarova told him she plans to open a coffee shop when she retires from tennis. The Czech added that she also plans to make the cakes herself.
After 39 minutes, Ana Ivanovic is one-set up against Elina Svitolina on Chatrier. A lovely drifted drop-shot at the net helps bring up set-point. There are fist pumps AND a thump of the chest for Ivanovic.
Ana Ivanovic is serving for the first set on Chatrier. Over on Lenglen, Lucie Safarova and Garbine Muguruza are locked in a very intense seventh game, which has seen the longest rally of the match so far - 21 strokes all told.
Lucie Safarova is having to do some stern defence on her service games as Garbine Muguruza is beginning to dominate play from the baseline. The Czech 13th seed holds in the sixth game but only when the Spaniard pumps her forehand long.
Having squandered her own service game with a double fault, Ana Ivanovic is back a break in front against Elina Svitolina. The Serbian seventh seed is being watched closely by her footballer beau Bastian Schweinsteiger, who gives a wink. Although it might just be a blink in the bright Parisian sunshine...
Very strange watching the scoreboards tick over in the first game of our quarters, as exactly the same thing was happening on both showcourts! Ana Ivanovic and Garbine Muguruza held serve after being taken to deuce.
Yikes! We're a little behind the players but let's do our own handshakes over the virtual net of Blog HQ. I'm Sarah Holt, your Blog mistress for the next few hours. Get in touch by tweeting me @sholtscribbles or have your say @rolandgarros.
Over on Lenglen, Garbine Muguruza and Lucie Safarova are sizing each other up for the first time, having never met before on the Tour. Muguruza has never reached a major semi-final before while Safarova reached the last four at Wimbledon in 2014. Safarova, the 13th seed, has played eight sets here at #RG15 and four of them have been tie-breaks, Will she go the distance again today?
We open with an intriguing encounter on Chatrier between Ana Ivanovic, the seventh seed and Elina Svitolina, seeded 19th. Since winning the title here in Paris in 2008, Ivanovic has never gone as far as a semi-final of a Grand Slam again. Svitolina has achieved her best result at a major by reaching the last eight at #RG15. The 20-year-old has nothing to lose now.
A sneak peek at Lenglen now reveals that Roger Federer - aiming to reach the semi-finals at Roland-Garros for the first time since 2012 - is sparring with Frenchman Tristan Lamasine as he gets in some practice ahead of the looming Swiss showdown.
Ana Ivanovic, the winner here in 2008, has the honour of being the only former female champion left in this side of the draw after defending champ Maria Sharapova fell to a shock exit yesterday at the hands of Lucie Safarova. If you'd forgotten how that match played out by the way, you can catch up with Matt Trolllope's report.
Hands up if you're ready for some #RG15 quarter-finals! Well, you're in luck because we are getting closer to the business end of the ball striking here at Roland-Garros. There are four quarter-finals this afternoon sprinkled with spice. Stay with us.
So, our female defending champion Maria Sharapova is out, Serena Williams hangs tough and Rafael Nadal and Novak Djokovic make a last-eight date. Our #RG15 quarter-finals are settled and they begin tomorrow. Let's meet back here for a 2pm start. Au revoir!
The word on the street is that there are now three Swiss players into the French Open quarter-finals for the first time. Guess what? Roger Federer and Stan Wawrinka - the top Swiss chaps - will be back on Suzanne-Lenglen tomorrow to fight for a place in the semi-finals..
There is a huge shout of "Allez Timea". The Swiss fans in the crowd sensing a victory for their top female player. Petra Kvitova drifts the ball into a net on a forehand and then she doubles the error by hitting wide. Timea Bacsinsky is into the quarter-finals of Roland-Garros.
Timea Bacsinszky has already reached a new Grand Slam high by reaching the fourth round in Paris. She's now ranked as the world No. 24 after breaking into the top-50 for the first time at the end of 2014. According to the WTA bible, she also has two dogs and two cats. So now you know.