Roger Federer was knocked out of the French Open at the quarter-final stage on Tuesday, falling in three sets to fellow Swiss Stan Wawrinka, the eighth seed, 6-4, 6-3, 7-6 (7/4). Federer, the second seed and 2009 champion at Roland Garros, had only ever lost twice in 18 previous meetings with his compatriot but was well beaten on a windy Court Suzanne Lenglen. Wawrinka, through to his first ever French Open semi-final, will face the winner of Tuesday's other quarter-final between Japan's fifth seed Kei Nishikori and home hope Jo-Wilfried Tsonga, the 14th seed.