Angelique Kerber put any concerns about her left elbow to rest Friday in the Rogers Cup.
Venus Williams opened play in the Rogers Cup on Wednesday with a 6-3, 6-0 victory over Barbora Strycova.
Top-ranked Novak Djokovic survived a scare to beat Gilles Muller 7-5, 7-6 (3) on Wednesday in the Rogers Cup, his final event before the Rio Olympics.
Stanislas Wawrinka had to pass a stern test lasting two hours before emerging with a 7-6 (7/3), 7-6 (10/8) victory over Mikhail Youzhny for a third-round berth at the Toronto Masters.
Eugenie Bouchard reconnected with her hometown fans with an impressive first-round victory at the women's Rogers Cup on Tuesday.
Former Grand Slam champions Petra Kvitova and Samantha Stosur were unfazed by opening-day weather delays, cruising into the second round of the WTA hardcourt tournament in Montreal on Monday.
Former world No. 1 Caroline Wozniacki suffered another setback in season of struggles Wednesday, retiring from a match she led against Australian top seed Samantha Stosur with a left arm injury.
Sam Querrey made a triumphant start to his first event since stunning top-ranked Novak Djokovic at Wimbledon, rallying Tuesday to reach the third round of the ATP and WTA Washington Open.
Taiwanese tennis star Hsieh Su-wei (謝淑薇) announced Wednesday that she would not represent Taiwan in the women's doubles event at the Summer Olympic Games in Rio de Janeiro, as an act of protest against the local tennis association's selection system for coaches and players.
Wimbledon champion Andy Murray has withdrawn from the Rogers Cup tennis tournament because of fatigue.