Roger Federer's successful title-winning season catalysed by improved backhand and masterstroke 'SABR' - Firstpost

Firstpost
Roger Federer's successful title-winning season catalysed by improved backhand and masterstroke 'SABR'
Firstpost
London: 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 "Sneak Attack By Roger". Roger Federer after winning the Halle Open ...
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