Then the coronavirus pandemic came, and everything changed.
With all professional tennis on hold for five months from the start of the spring of 2020, Krejcikova finally had time to work on some technical aspects of her singles game. More importantly, the pandemic helped her her put things in perspective.
Her new approach paid off on Wednesday at Roland-Garros, where she saved five set points in the first set to beat 17-year-old Coco Gauff 7-6(6), 6-3 and move to her first singles Grand Slam semi-final.
“Just seeing that there are also other things in the world that actually are happening, are just tougher and more difficult than just me playing tennis and losing, or me just playing tennis,” the Krejcikova told reporters in Paris.
“I go and I play tennis and I lose, but there are actually people that are losing their lives. I just felt more like, 'Well, just relax because you are healthy. Just appreciate this and just enjoy the game'.”
Looking back, Krejcikova realised she had been putting herself under too much pressure when it came to playing singles.