The third seed suffered a 6-4 6-1 loss to world No.24 Azarenka in the Australian Open quarterfinal.
"Hitting the ball deep, taking it early, changing the direction on the ball, doing things that I usually like to do to people," Pegula said, per WTA Insider. "She was doing it well. Made it tough for me to feel I could really pressure her. Felt like she was pressuring me constantly the whole time."
Pegula, who was the highest-seed left before losing to Azarenka, said it's a good thing she is playing a doubles match with Coco Gauff on Wednesday.
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"It helps that I'm playing doubles tomorrow because I don't have so much time to sulk around and be in my feelings," she added. "I'm going to be pretty pissed about my match. But tomorrow is another chance to get another win, get a better feeling, and be in a competitive mindset."