The US Open 2013 tennis tournament starts on Monday at Flushing Meadows, New York. All the action starts at 11 a.m. ET and can be watched online through free live stream via the link provided below. All the action on the Arthur Ashe Stadium starts with two big women's singles games; Radwanska vs Soler Espinosa of Spain, and Venus Williams vs Flipkens of Belgium. Following those two opening matches, the men's tournament will take over the main court with second seed Rafael Nadal vs Harrison of the United States. The final two games scheduled for Monday in the first round will be Serena Williams vs Schiavone, and Roger Federer vs Zemlja in the men's tournament. Ahead of the tournament Novak Djokovic has suggested that Rafael Nadal is the man to beat in the men's draw. Nadal has shown some fantastic form and has a 15-0 record on hard courts this year so far. He has won Masters titles on the surface in Indian Wells, Montreal and Cincinnati. Nadal has shocked many as he only came back into action from a seven month lay off with injury in February. But since then he has shown why he is considered one of the best men's tennis players ever. Djokovic has said, "Nadal is definitely back and playing maybe the best tennis that he ever has played on hard courts. He's definitely so far the best player this year. There is no question about it. The results are showing everything." Meanwhile, defending champion Andy Murray of Great Britain has also said it would be very difficult for anyone to beat Nadal. He said, "He hasn't lost yet because he's beaten some tough players in tough tournaments, winning the two tournaments back to back in Cincinnati and Canada. I think it's only been done once before. I think Roddick did it once [in 2003], so it doesn't happen often. It's not like he's had easy draws or whatever. He's beaten some top, top players."