Serena Williams advanced to the Rogers Cup quarterfinals Thursday at Montreal, waiting out a brief rain delay to beat Lucie Safarova, 7-5, 6-4.
On Friday, Williams will play Caroline Wozniacki, a 6-1, 6-0 winner over American qualifier Shelby Rogers.
In other matches, Spain's Carla Suarez Navarro upset fourth-seeded Maria Sharapova, 6-2, 4-6, 6-2, in a match delayed twice by rain, and Russia's Ekaterina Makarova topped second-seeded Wimbledon champion Petra Kvitova, 6-4, 1-6, 6-2.
The 25-year-old Suarez Navarro won the Portugal Open in May for her first WTA Tour title. She'll face Venus Williams in the quarterfinals. Williams beat Angelique Kerber, 6-3, 3-6, 6-4.
Makarova will play qualifier Coco Vandeweghe, a 7-6 (8), 2-6, 7-5 winner over seventh-seeded Jelena Jonkovic.
Also, eighth-seeded Victoria Azarenka beat Heather Watson, 6-2, 6-4.
Top-ranked Novak Djokovic was upset by 13th-seeded Jo-Wilfried Tsonga in the Rogers Cup at Toronto, falling 6-2, 6-2 in only 63 minutes in the third round.
Djokovic came in with 11 straight wins over Tsonga but was nowhere near adding a 12th.
“Just nothing was going,” Djokovic said. “No baseline, no serve, no return. So just generally very bad day, very poor performance.”
Second-seeded Roger Federer avoided an upset, beating Marin Cilic, 7-6 (5), 6-7 (3), 6-4.
Tsonga will play eighth-seeded Andy Murray in the quarterfinals. Murray advanced when third-round opponent Richard Gasquet withdrew because of an abdominal strain.
Djokovic's loss was the second big upset of the day. Third-seeded Stan Wawrinka lost, 7-6 (8), 7-5, to Kevin Anderson. Anderson will play Grigor Dimitrov, a 7-5, 5-7, 6-4 winner over Tommy Robredo.
David Ferrer was pushed to three sets in a 1-6, 6-3, 6-3 victory over Ivan Dodig. Canada's Milos Raonic also advanced, beating Julien Benneteau of France, 6-3, 4-6, 6-4.
Raonic will play Feliciano Lopez in the quarterfinals. Lopez beat Tomas Berdych, 3-6, 6-3, 6-4.Copyright © 2015, The Baltimore Sun