Juan Martin Del Potro stormed to a 6-4 6-0 first round win over Finland's Jarkko Nieminen at the Rogers Cup on Monday, the Argentine continuing his impressive comeback with the US Open on the horizon.
Belgium's world number two Kim Clijsters shot down talk of retiring after next year's London Olympics and said she would rather have a much lower-key farewell.
Unseeded Radek Stepanek's net-charging style carried him to the Legg Mason Tennis Classic title at age 32, making him the tournament's oldest champion since Jimmy Connors was 35 in 1988.
Venus Williams has withdrawn from the Rogers Cup due to an illness.
Agnieszka Radwanska of Poland won her first tournament in more than three years with a 6-3, 6-4 victory over third-ranked Vera Zvonareva at the Mercury Insurance Open final Sunday.
Novak Djokovic returned from the studio to the stadium after two well-received late-night US television appearances in the run-up to Monday's start of the Montreal Masters.
Roger Federer will turn 30 next week, but the Swiss winner of a record 16 grand slam singles titles said on Wednesday he will not pause for reflection since he is too busy plotting for more tennis success.
China's Peng Shuai entered the US hard court season with a career-high ranking and now holds hopes of some day matching the heroics of her trailblazing countrywoman, Li Na.
Maria Sharapova may not have won a grand slam title since 2008, but the Russian tennis player remains unchallenged as the world's highest paid woman in professional sports.
Comeback queen Serena Williams won her first tournament in more than a year when she overpowered third seed Marion Bartoli of France 7-5 6-1 in the Stanford Classic final on Sunday.
Serena Williams and Maria Sharapova plan to keep any hostilities confined to the court when they face off in the Stanford Classic quarter-finals on Friday.
Fourteen-time Grand Slam winner Peter Sampras will play former World No 1 Marat Safin on Sept 30 to open the new tennis stadium before the China Open.