John McEnroe has urged Andy Murray to attack the net more if he plays Roger Federer or Novak Djokovic at the upcoming US Open. Murray hit on the Arthur Ashe Stadium court on Wednesday as he prepares for the final Grand Slam of the year. The British No 1 will be seeded third in Thursday's draw which means he faces a potential clash with Federer or Djokovic in the semi-finals. - Video Source
