Canada's top female player, Aleksandra Wozniak has been diagnosed with an AC joint sprain in her right shoulder, an injury that will keep her out of action for a minimum of six weeks and puts an end to her 2012 season.

The four Canadians in the singles main draw at Wimbledon were in action on Tuesday at the All-England Club as Stéphanie Dubois, Vasek Pospisil, Milos Raonic and Aleksandra Wozniak took to the court for their first round matches.

On the women's side, Wozniak went up against Russian Vera Dushevina, ranked no. 94 on the WTA rankings. The two players had met once before on grass in 2009 and Wozniak dominated her opponent 6-1, 6-0. Dushevina proved to be tougher competition on Tuesday, but Wozniak still came away with a 6-2, 7-5 victory.

Tennis Canada announced Wednesday the four players nominated for selection to the Canadian Olympic Team for the London 2012 Olympic Games. Daniel Nestor (Toronto), Vasek Pospisil (Vancouver), Milos Raonic (Thornhill, Ontario) and Aleksandra Wozniak (Blainville, Quebec) will represent Canada in London. Raonic and Wozniak will play singles while Nestor and Pospisil will team up for doubles.

In singles, the Top 56 players in the world as of the June 11 rankings deadline receive direct entry into the tennis event provided they meet all other requirements set out for qualification. Raonic sits at No. 21 in the world while Wozniak's third round appearance at the French Open lifted her to the exact cut-off point of No. 56. It will be the first Olympic Games for both.