Roger Federer and Stan Wawrinka will meet in an all-Swiss semi-final at the US Open after impressive wins over Richard Gasquet and Kevin Anderson.<br />Seventeen-time Grand Slam champion Roger Federer did not face a single break point as he beat Frenchman Gasquet 6-3 6-3 6-1 in just 87 minutes.<br />Wawrinka made almost as short work of Andy Murray's conqueror Kevin Anderson, beating the South African 6-4 6-4 6-0.<br />Top seed Novak Djokovic will face holder Marin Cilic in the other semi.
