The British star suffered the injury while chasing down a forehand shot in his
Wednesday victory on the hardcourts at Toronto's Rexall Centre.
The second-seeded Murray was scheduled to battle 16th-seeded rising Canadian
favorite Milos Raonic on Thursday, but Raonic, instead, moved into the
quarterfinals via walkover.
Murray, who's a two-time Rogers Cup champion, upset Roger Federer in this
past Sunday's marquee men's singles gold-medal match at the All England Club,
where the British star lost to the Swiss great in the Wimbledon finale last
Rain wiped out all singles play on Thursday, causing a logjam for Friday's
schedule. Players will compete in third-round matches and then turn around for
quarterfinal encounters later in the day and at night.
Top seed Novak Djokovic, the reigning Australian Open and U.S. Open champion,
will battle American Sam Querrey in round three. The two-time Rogers Cup
titlist Djokovic beat American Mardy Fish in last year's Rogers Cup finale in
This sixth of nine ATP Masters events will pay its newest champion $522,550.