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

I Should Be Doing the Other Press Conference' – Refusing to Accept US Open Defeat, Salty Roger Federer Once Went on a Wild Rant Against 'Lucky' Novak Djokovic - EssentiallySports

2012 French Open: Djokovic and Federer Survive to Set Up Semifinal Clash - The New York Times

Federer defends 'SABR' attack as US Open final tension builds

Exactly 10 years ago Federer was publicly struggling to accept Djokovic defeat. How do you see it now?

Djokovic, new king of tennis in 2011, Tennis

To Lose Against Someone Like That Is Disappointing: When Roger Federer Was Infuriated by Novak Djokovic at US Open - The SportsRush

Novak Djokovic, Murray rekindle old rivalry in U.S. Open final

Roger Federer vs Novak Djokovic: Best of all time vs best of this time

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

Roger Federer, Novak Djokovic Face Off In 2011 U.S. Open Semifinal

Australian Open 2011: Novak Djokovic sets up semi clash with Roger Federer after brushing aside Tomas Berdych

Fired-up Federer survives

At Wimbledon, Federer Chases History, and Nadal - The New York Times