Paris, France – Novak Djokovic withdrew from his scheduled Wilfried Tsonga at the Paris Masters because of a right shoulder injury.
Friday's walkover win puts Tsonga into the semifinals. The sixth-seeded Frenchman won this title in 2008.
"I am very sorry for the tournament and the fans in Paris, but my right shoulder is hurting again after winning my first two matches here," said Djokovic, the 2009 Paris Masters champ.
"The doctors have advised that I should rest my shoulder and start treatment as soon as possible. I look forward to returning to the court in London and competing at the Barclays ATP World Tour Finals."
The season-ending event in London is scheduled to start November 20.
Djokovic is enjoying one of the best seasons in tennis history. The Serb has an incredible 69-4 match record, including 10-1 in title matches, becoming the top-ranked player in the world in the process. He has also captured three of the year's four Grand Slam events, taking the Australian Open, Wimbledon and U.S. Open crowns.