Federer, 36, to be oldest No. 1 ever in ATP

Roger Federer’s win over Robin Haase on Friday in Rotterdam sealed a return to the top of the tennis world rankings for the first time in more than five years, which also will make him the oldest No. 1 ever in the ATP’s rankings.

Federer, 36, to be oldest No. 1 ever in ATP
Source: tennis espn