WASHINGTON - Juan Martin Del Potro, coming off an epic Wimbledon semi-final loss to world No 1 Novak Djokovic, says he is ready to close the gap on the world's top tennis players. The seventh-ranked Argentine is the men's top seed for this week's $1.76 million ATP and WTA Washington Open, his first event since losing the longest semi-final in Wimbledon history 7-5, 4-6, 7-6 (7/2), 6-7 (6/8), 6-3 after four hours and 43 minutes. "It was a very good experience for me even in the loss," Del Potro said Monday. "I played a good match with the number one in the world in the semi-finals at Wimbledon. It was a really long battle for both of us. We played an incredible match for about five hours with high intensity. After that I needed a week to recover myself. And Novak was really tired in the final.”–AFP