Sweden's Carl Pettersson staged a powerful back-nine charge to overhaul a crumbling Dean Wilson and claim a dramatic one-shot victory at the Canadian Open on Sunday.

Trailing Wilson by four strokes standing on the 11th tee, Pettersson shifted into top gear by carding four birdies over the next five holes to surge past the reeling American with a three-under 67 to claim his fourth U.S. PGA Tour title.

Pettersson had displayed a flair for the dramatic all week at St. George's Golf and Country Club, just making the one-under cut to sneak into the weekend and rocketing into contention on Saturday with 10-under 60, the lowest score ever in the 101 years of the Canadian Open.

The Swede provided one final bit of suspense at the 18th when he missed a six-foot par putt but was left an easy tap-in for a bogey and a winning total of 14-under 266.

What had been a fairytale week ended in crushing disappointment for Wilson, who only gained entry into the event on a sponsor's exemption after losing his full-time PGA Tour playing privileges.

After three consecutive 65s Wilson wilted under the Swede's pressure stumbling to final round two-over 72.

(Editing by Ed Osmond, thomsonreuters.com; +1 248-605-1131; Reuters Messaging: steve.keating.reuters.com@reuters.net For the new Reuters sports blog Left Field go to: http://blogs.reuters.com/sport/))

Please double-click on the newslink:

[GOLF-LEN] for more golf stories