“That was crazy,” Wozniacki said after winning the last six games in a memorable 3-6, 6-2, 7-5 victory. “I don’t know how I got back into the match. I was like, ‘This is my last chance.
“At 5-1, 40-15, I felt like I was one foot out of the tournament. She served a great serve down the T — it was just slightly out. I was kind of lucky.”
Wozniacki won the next nine points, and 24 of the 31 points played from when she first faced match point. She clinched a 75-minute third set on her first match point when Fett netted a backhand.
The former No. 1-ranked Wozniacki will next play No. 30 Kiki Bertens, who beat Nicole Gibbs, 7-6 (3), 6-0.
Tsonga rallied from 5-2 in the fifth to overcome Denis Shapovalov, 3-6, 6-3, 1-6, 7-6 (4), 7-5 in a 3-hour, 37-minute match that contained one of his nonchalant between-the-legs shots on an important point.
In what shapes as an entertaining showdown, he’ll meet No. 17-seeded Nick Kyrgios in the next round.
Kyrgios had a 7-5, 6-4, 7-6 (2) win over Viktor Troicki, overcoming audio problems at Hisense Arena and complaining to chair umpire James Keothavong, who ended up turning off his microphone.