MONTREAL -- Roger Federer has pulled out of the Rogers Cup following three straight early exits from tournaments.
The Swiss star gave no reason Friday for the withdrawal. The tournament begins Monday in Montreal.
Federer, the winner of 17 Grand Slam singles titles, is now ranked No. 5. He says in a statement he's "disappointed" to miss the Montreal event and looks forward to playing there again. He won the Rogers Cup in Toronto in 2004 and 2006.
Federer lost to No. 55 Daniel Brands last week in his opening match at the Swiss Open. In Hamburg, Germany, he cited back pain in his defeat to No. 114 Federico Delbonis. He fell to No. 116 Sergiy Stakhovsky in the second round at Wimbledon.