US Open 2011: Roger Federer struggles to accept Novak Djokovic

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

Federer, Nadal join Djokovic in Indian Wells quarterfinals

Rafael Nadal tops Roger Federer in straight sets; Novak Djokovic vs. Dominic Thiem suspended at French Open

Why does Roger Federer's US Open defeat to Novak Djokovic hurt most? – Firstpost

Novak Djokovic - Wikipedia

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Lago Titicaca Selezionare Rifiuto 2011 us open tennis winner Seminario impicciarsi Voltaggio

Who do you think is the worst behaved player ever in tennis, Williams, Kyrgios, McEnroe, Connors or someone else? - Quora

Roger Federer, Novak Djokovic set stage for classic showdown in U.S. Open men's final

Is Roger Federer the sorest loser in the history of tennis? - Quora

2011 Novak Djokovic tennis season - Wikipedia

Federer ready for run at 6th Open title