Swiss tennis star Roger Federer has won against Stanislas Wawrinka in the fourth round of the French open, beating his countryman in three sets: 6-3, 6-2, 7-5.
Federer, the world number three, outclassed the 14th-ranked Wawrinka on Sunday in Paris to reach a record 28th career Grand Slam quarterfinal.
"28 quarterfinals in a row, that's great," Federer said. "But that's another opportunity for me to go one step further."
The two Swiss have so far played each other nine times, including in the last 16 at last year’s French Open. Wawrinka has won only one of those encounters, in Monte Carlo two years ago. Federer and Wawrinka, Davis Cup teammates, won the men's doubles gold at the 2008 Olympics.
Federer, who has won 16 Grand Slam titles during his career, has not dropped a set at Roland Garros this year. However, he has won the French Open only once, in 2009. Last year he was knocked out in the quarterfinals.
Federer will now meet either the Spaniard David Ferrer (world number seven) or Frenchman Gaël Monfils (number nine).
swissinfo.ch and agencies