Madison Keys ousts Venus Williams in third round of Montreal's Rogers Cup

Kristina Kucova of Slovakia celebrates a point against Canada’s Eugenie Bouchard in their Rogers Cup third round match in Montreal on Thursday. Kucova won 3-6, 6-4, 6-3. (Photo: AP)

Sixth-seeded Venus Williams tumbled out of the Rogers Cup in the third round on Thursday night, falling 1-6, 7-6 (2), 3-6 to 10th-seeded Madison Keys in an all-American match.

Playing her last tournament match before the Rio Olympics, the 36-year-old Williams lost seven straight games before holding serve in the third game of the second set. After Williams rallied to tie the match, Keys found her serve in the third set, ending the match with her 12th ace.

The 21-year-old Keys won the Wimbledon tuneup event in Birmingham, England, this year for her second WTA Tour title, then reached the fourth round at Wimbledon. She’ll face 16th-seeded Anastasia Pavlyuchenko-va of Russia in the quarter-finals.

Pavlyuchenkova beat fourth-seed Agnieszka Radwanska of Poland.

Pavlyuchenkova let two match points slip away while leading 5-4 in the second set and then lost the game on a double fault. She rebounded in the third set to extend her longest run at the hardcourt event.

Radwanska won in 2014 in Montreal.

The 15th-seed Konta beat American Varvara Lepchenko 6-3, 6-2 to set up a quarter-final against Slovakia’s Kristina Kucova, a 3-6, 6-4, 6-3 winner over Canada’s Eugenie Bouchard in the late match. Bouchard was penalised a point for racket abuse in the third set as she struggled to hit the lines, much to her disappointment.