Jo-Wilfried Tsonga will miss the rest of the tennis season with a knee injury, ruling him out of France's Davis Cup final against Serbia next month.
The French No. 1 hurt his left knee at Wimbledon earlier this year, and the injury flared up again after last week's Open Sud de France, where he lost in the semifinals to Davis Cup teammate Gael Monfils.
''I will need to have six weeks of complete rest,'' the 13th-ranked Tsonga said Wednesday. ''I could have played by taking loads of anti-inflammatories, but the risk is getting injured for six months. It's the hardest moment of my career along with pulling out of the Olympic Games (in) 2008.''
Tsonga had hoped to play in next week's Paris Masters, a tournament he won in 2009.
The Davis Cup final will be played in Belgrade from Dec. 3-5.
With Tsonga out, the French squad will be led by 14th-ranked Monfils, who won the Open Sud title on Sunday. Gilles Simon and Richard Gasquet are contenders for the other singles spot.
