Roger Federer was left stung by Novak Djokovic's comeback in their five-set US Open semi-final
If Djokovic defeated Federer (and Nadal) at the 2011 French Open, could he have defeated Nadal in upcoming seasons there? - Quora
US Open: Novak Djokovic holds off gallant Roger Federer to win men's final in four sets - ABC News
The Evolution of the Roger Federer vs. Novak Djokovic Rivalry, News, Scores, Highlights, Stats, and Rumors
At the U.S. Open, Novak Djokovic Struggles to Close - WSJ
Djokovic vs. Federer in US Open 2011 semi-final
Roger Federer Was In a Great Mood After Novak Djokovic Beat Him at US Open Despite Having Match Points - The SportsRush
Roger Federer: You can't always win, spc talk
The Top Five Wins For Roger Federer Over Novak Djokovic - World Tennis Magazine
Australian Open 2011: Novak Djokovic sets up semi clash with Roger Federer after brushing aside Tomas Berdych
Fired-up Federer survives
