LONDON (Reuters) - What started as a bit of fun may just have led to a masterstroke. It was the summer of 2015 when, on the suggestion of his coach, Severin Luthi, Federer unleashed the SABR, the ...
World number two Roger Federer said his flashy return of serve and his volleying have been the key to his US Open success this year. Roger Federer credits SABR, volleying at US Open The second seed is ...