Andy Murray will go on and win more majors after US Open success says British No 1's coach Ivan Lendl That sentiment was echoed by Murray himself, who admitted the success had lifted a weight off his back. It was an incredibly tough match and obviously it felt great at the end. Relief is probably the best word I would use to describe how I'm feeling just now," Murray said. I'm very, very happy that I managed to come through because if I had lost this one from two sets up, that would have been a tough one to take. The victory came nine weeks after Murray shed floods of tears on Centre Court following his loss to Roger Federer in the Wimbledon final, and just four weeks after he gained revenge over the world No 1 on the same court to win Olympic gold. That Olympic victory has been credited in many parts for the resolve Murray showed last night and his ability to finally get over the line. However, Lendl believes an earlier moment in Murray's incredible season, a painful defeat rather than a joyous victory, is at its root. "One of his most important matches of the year, maybe the most important, was his loss to Novak at the Australian Open, because that was war just like tonight," said Lendl. That gave him the belief that he can hang with these guys and it showed him what it would take to win. It didn't catch him by surprise. Go back to the Olympics - he has already won a big one. He won two big ones in this fantastic year. I'm very happy for Andy. It's a great achievement and let's hope he can continue and rake up more. Andy has been maturing very nicely as a player, as a competitor, as a person. As you mature you become more comfortable in these situations. Of course, it's very important to be in more of these situations and the more of them you are in the more comfortable you feel. Lendl joined Murray's coaching staff at the end of last year. He too won his first grand slam after four finals defeats, before going on to claim eight major prizes. Murray now looks well set to emulate him further.