Six-time champion Roger Federer beats Kazakhstan 's Mikhail Kukushkin at Wimbledon . Second seed Novak Djokovic also wins his opening match of grass-court event . Seventh seed David Ferrer progresses along with three-time runner-up Andy Roddick . I 'm happy to see that I 'm playing well again and that I 'm mentally really fresh to have more success . TL;DR Rafael Nadal defeats Juan Martin Del Potro in straight sets to reach the semifinals for a record eighth time. No . 4 Juan Martin del Potro also reaches second round in England .
Six-time champion Roger Federer beats Kazakhstan 's Mikhail Kukushkin at Wimbledon . Second seed Novak Djokovic also wins his opening match of grass-court event . Seventh seed David Ferrer progresses along with three-time runner-up Andy Roddick . TL;DR Rafael Nadal defeats Juan Martin Del Potro in straight sets to reach the semifinals for a record eighth time. No . 4 Juan Martin del Potro also reaches second round in England .