The expectations for Andy Murray ratcheted up a notch yesterday after the Scotsman defeated Juan Martin Del Potro 6-7 (4), 7-6 (3), 6-1 in the final of the Rogers Cup at Montreal. The title, Murray’s fifth of the year, improved his record to an ATP-best 50-7 this season and vaulted the 22-year-old redhead to No. 2 in the world in today’s new rankings, supplanting Rafael Nadal, who dropped to No. 3. In the end, Murray proved to be fitter, quicker and more resilient than his No. 6-ranked opponent. Del Potro, fresh off a win last week at Washington, had the better of Murray for almost two sets. After holding serve to take a 6-5 lead in the second set, the Argentine took an injury timeout for treatment to his left side. Murray, a tad miffed by the stoppage, held to force the tiebreaker and then took control. The Scotsman’s rigorous training in the heat of Miami after Wimbledon proved to be the difference as Del Potro wilted in the sultry conditions. “It was difficult because Juan played unbelievably for the first two sets and I was on the defensive because of that, and I had to do a lot of running,” Murray said. “But he has had a lot of matches in the last two weeks and I knew it would be difficult in this heat. I needed to serve well because he was serving great. I hit three aces in the (second set) tie-break and that was the difference from the first set. Then I had to stay tough to stay on top.” Now that he’s ranked No. 2, Murray will feel even more pressure to win his first major. Many predicted the Scotsman would get off the schneid and win at Melbourne in January. Fernando Verdasco bounced Murray in the fourth round. With Nadal sidelined by injury and Roger Federer presumed spent from finally winning the French Open, Wimbledon seemed ripe for the taking. Andy Roddick ended that dream in the semis. For now, Murray must be content adjusting to his new, lofty status. “I love winning tournaments, and every player will tell you the same thing,” Murray said. “But it’s tough because I’ve never been to No. 2 in the world before, so that’s new to me.” The U.S Open starts in two weeks, though, and you can be sure the Murray chatter isn’t going to go away.