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

Novak Djokovic defeated Roger Federer in the US Open final and here are five things we learned, Tennis News

New No. 1 Djokovic, old No. 1 Nadal reach final at Wimbledon

Djokovic–Federer rivalry - Wikipedia

Roger Federer beats Novak Djokovic in Shanghai Masters semifinals - Los Angeles Times

2011: Djokovic hits return heard 'round the world to beat Federer

French Open Tennis 2011: 10 Reasons Why Roger Federer Won't Bounce Back, News, Scores, Highlights, Stats, and Rumors

FRENCH OPEN 2022: Djokovic, Nadal, Alcaraz lead men's field - The San Diego Union-Tribune

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

Novak Djokovic stuns Roger Federer in US Open semi-final, Roger Federer

Novak Djokovic: 'Beating Roger Federer in 2011 is my best US Open memory

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

Roger Federer, Novak Djokovic reach US Open final - The Boston Globe

Federer fails to impress, Tennis News

Novak Djokovic stands alone

Djokovic eyes history with a 23rd Grand Slam title at the French Open