What the winner said
"I thought today was going to be a very long day but actually ended up being a quicker day than I was expecting, which is always good, especially if you're winning," Pegula said, having also played - and won - her first-round match in doubles with Coco Gauff.
"It's very windy out today, different conditions, but the sun is out and I feel like the clay is playing very nice. A little quicker when the sun is out as well but tricky conditions with the wind today, for sure."
Pegula said Elise Mertens, her third-round opponent, would be a difficult customer.
"We haven't played in a little while," she said. "We played doubles quite a few times but not singles. She's really tricky I think. A really smart player. Kind of a counter-puncher, but is very strategic as well.
"So I think it will be difficult. I don't know if we've ever played on clay before, but it will definitely be a match where I'm not going to be able to make a lot of errors, can't really go for too much. I'm going to have to play smart, serve smart. She also competes very well.
"I know that going in, it's going to be a tough match and a tricky match-up for me."