London: Novak Djokovic has clinched the year-end No. 1 ranking.
Djokovic lost the top spot to Roger Federer in July but will return to No. 1 next week.
The ATP says Federer will drop points from his 2011 title wins at the Swiss Indoors and Paris Masters. He lost in the Swiss Indoors final Sunday to Juan Martin del Potro, and then pulled out of next week's Paris tournament.