'I would like Roger Federer to retire on...', says trainer Tennis World USA Federer: I just turned 40 and am still active, who would have thought it? MARCA.com Second Service: Medvedev praises Djokovic; Federer a doubt for US Open Tennishead Martina Navratilova Says Next-Gens Are Not As Good As Roger Federer, Rafael Nadal and Novak Djokovic EssentiallySports Why Nadal like Federer will not play the US Open Tennis
