Novak Djokovic on battling for year-end No. 1 spot - Tennis World USA

Novak Djokovic on battling for year-end No. 1 spot  Tennis World USARoger Federer left to rue Rafael Nadal and Novak Djokovic success as rivals end record run  ExpressATP Finals: Rafa Nadal, Novak Djokovic battle for No. 1  Channel3000.com - WISC-TV3Roger Federer all set for Novak Djokovic clash: 'Wimbledon was epic, but I moved on a long time ago'  Tennis365Nadal optimistic on fitness as he chases year-end No.1 rank in London  The AgeView full c