Roger Federer set up a mouth-watering French Open semi-final clash with Rafael Nadal on Tuesday when he defeated Stan Wawrinka in four sets to become the oldest men's Grand Slam semi-finalist in 28 years.
The 37-year-old Swiss beat his compatriot 7-6 (7/4), 4-6, 7-6 (7/5), 6-4 to reach his 43rd major semi-final and eighth at Roland Garros (RG).






