Novak Djokovic, Juan Martin del Potro, Grand Slam, Rafael Nadal, Roger Federer, Wimbledon Open, US Open, Argentina, Serbia, Arthur Ashe Stadium, Tennys Sandgren, Meryl Streep, Roland...
Argentina’s Juan Martin del Potro stunned Roger Federer in four sets to reach the US Open semi-finals, dashing hopes of a Rafael Nadal versus Federer semis....