This year's Rogers Cup tournament in Toronto will be lacking some major star power.

Tennis Canada confirmed on Tuesday that Roger Federer and Rafael Nadal were both withdrawing from the tournament, joining 2016 Wimbledon champ Andy Murray on the sidelines.

"Toronto is one of my favourite events on the calendar and I am disappointed that I won't be able to compete in front of the great tennis fans in Canada," Federer said in a release. "Looking ahead, it is best for me that I take more time after Wimbledon. I look forward to coming back to Canada next year and I wish Karl Hale and everyone at Tennis Canada a very successful tournament."

Nadal hasn't played since withdrawing from the French Open after suffering a wrist injury.

"I only started practicing a week ago after my wrist injury and I am not ready to play such an important event," Nadal said. "I am very much looking forward to playing in Toronto in a couple of years since I have always been treated great in that tournament and have a lot of great Canadian fans."

The Rogers Cup is set to begin with qualifying on Saturday.​