US Open 2011: Roger Federer struggles to accept Novak Djokovic defeat, US Open 2011

Roger Federer was left stung by Novak Djokovic's comeback in their five-set US Open semi-final

2011 U.S. Open: Federer Is Set to Battle Djokovic in Semifinals - The New York Times

French Open title awarded to Nadal after Federer defeat

Murray to face Djokovic after five-set defeat of Federer

Novak Djokovic has won 24 Grand Slam titles. Here is a look at each one

Roger Federer ends Novak Djokovic's 28-match streak in China

Roger Federer Was In a Great Mood After Novak Djokovic Beat Him at US Open Despite Having Match Points - The SportsRush

Federer powers into U.S. Open quarter-finals, Tennis

Novak Djokovic: The Shot and The Confrontation

AUSTRALIAN OPEN 2011: Roger Federer faces crunch time against Novak Djokovic

U.S. Open: Federer moves on to Round 2