Collins ousted by qualifier in Guadalajara; Azarenka withdraws

GUADALAJARA, Mexico -- Second-seeded Danielle Collins lost in the second round of the Guadalajara Open on Wednesday and third seed Victoria Azarenka withdrew from her match because of injury.

Qualifier Olivia Gadecki , ranked No. 152, pulled off a major upset with a 6-3, 6-3 win over Collins to reach the quarterfinals of an elite WTA tournament for the first time. She beat former US Open champion Sloane Stephens in the first round.

The 30-year-old Collins, who is retiring at the end of the season, arrived at Guadalajara with 39 tour-level wins and two titles on tour this year and is currently ranked 11th.

Earlier, Kamilla Rakhimova advanced to the quarterfinals after two-time major winner and former No. 1-ranked Victoria Azarenka withdrew from their match in the second set while trailing 6-2, 3-0.

Rakhimova will next play Camila Osorio , who beat seventh-seeded Veronika Kudermetova 7-6, 6-7 (2), 7-5.

The tournament is played in hard-court at the Complejo Panamericano de Tenis, in Guadalajara.