SEMI FINAL PREVIEW. Nadal and Federer meet for a 40th time.

Old rivals Roger Federer and Rafael Nadal will meet at Wimbledon for the first time in nine years as they face off in the semi final tomorrow. In their 40th meeting, it is the first time the pair are meeting at Wimbledon outside of the final. Sharing the court in three Wimbledon finals, Federer leads…