Jo-Wilfried Tsonga has confirmed that he will not be fit in time to take part in the US Open.
The Frenchman, a three-time quarter-finalist at Flushing Meadows, has been out of action on the ATP World Tour since February, undergoing surgery on his left knee at the start of April.
And as he continues his rehabilitation, the final grand slam of the year will come too soon for Tsonga, although he could yet return before the end of the season.
"It takes time to heal and now I cannot compete, so unfortunately I have to forfeit the US Open," the 33-year-old said in a video message posted on Twitter.
"I am hopeful that I will be able to start again before the end of the season and to get back and play the next [tournament] with certainty and in better conditions. It's not easy, but I will press on."
Tsonga reached the third round at the Australian Open, which will represent his only slam of 2018.
