Montreal:Andy Murray celebrated his ascent to the world number two ranking as he fought back to beat Juan Martin Del Potro 6-7 (4/7), 7-6 (7/3), 6-1 Sunday to win the Montreal Masters.
The Scot, who will trail Roger Federer in Monday's rankings after taking the second spot from Rafael Nadal, needed a two hour, 44-minute effort to claim his fifth trophy of the season.
That success lands him level with Spain's Nadal for the most titles of 2009.
Del Potro, winner a week ago in Washington, looked strong to start, but needed treatment on a shoulder and rib problem in the second set and took an off-court injury timeout to start the third.
Murray lost a 62-minute opening set, but levelled by winning the tiebreaker in the second.
"I had those three aces in the tiebreaker to get back into it," said Murray. "Juan Martin served unbelievably in the first two sets.
"I tried to stay in it to the end. It was tough conditions for both of us out here.
"He really made me run. But I knew he had played a lot of long matches in the last two weeks so I hung tough."
Murray broke for 2-0 in the third as his Argentinian opponent looked to be running low on reserves.
"I fought until the end but I couldn't go past Andy," said the 20-year-old Del Potro, who is 6-2 in career finals.
Murray claimed his 50th match victory of the season as he heads to Cincinnati to defend his Masters title in the American Midwest.