The devastating change powering Federer's resurgence - Yahoo7 Sport

Yahoo7 Sport
The devastating change powering Federer's resurgence
Yahoo7 Sport
It was the summer of 2015 when, on the suggestion of his coach, Severin Luthi, Federer unleashed the SABR, the "Sneak Attack By Roger". Charging forward as his opponent tossed the ball, Federer would return serve on the half-volley, rushing the server.and more »