July 24 (Reuters) - Wimbledon ⁠champion Jannik Sinner and 24-times Grand Slam ⁠winner Novak Djokovic have withdrawn from next ‌month's U.S. Open tune-up event in Montreal, tournament organisers said on Friday.

Sinner’s withdrawal is expected to make world number ​two Alexander Zverev and Canadian ⁠Felix Auger-Aliassime the ⁠first and second seeds at the tournament which runs ⁠from ‌August 1 to 13.

Seven-times Grand Slam champion and world number three Carlos ⁠Alcaraz was ruled out already with a ​wrist injury.

“After ‌carefully considering all the factors together with ⁠my team, ​we have made the difficult decision to withdraw from Montréal. It is never easy to miss ⁠such an important event, but we ​believe this is the right decision to prioritize my health. I’m disappointed not to be there, ⁠but I look forward to returning to Montreal in the future,” Sinner said in a statement.

The 24-year-old Italian defended his Wimbledon title this ​month with a four-set win ⁠over German Zverev to claim his fifth Grand ​Slam title.

Djokovic, 39, reached the ‌Wimbledon semi-finals, where Sinner defeated ​him in three sets.

(Reporting by Nicole Fernandes in Toronto, editing by Ed Osmond)