ANKARA

Swiss tennis star Roger Federer on Wednesday announced he would miss the remainder of the year after suffering a setback during his initial rehabilitation from surgery on his right knee last February. 

"A few weeks ago, having experienced a setback during my initial rehabilitation, I had to have an additional quick arthroscopic procedure on my right knee," Federer, 38, said on Twitter.

"Now, much like I did leading up to the 2017 season, I plan to take the necessary time to be 100% ready to play at my highest level."

The 20-time Grand Slam winner said he looks forward to return to the court at the beginning of 2021 season.