Scott supreme at Firestone!

Adam Scott put on a final round masterclass to complete a resounding four-shot victory in the WGC-Bridgestone Invitational at Firestone in Ohio.

The Australian, who had been at the head of the field after shooting a brilliant 62 in the first round, completed his wire-to-wire victory with a joint best-of-the-day five-under 65.

Aided by new caddie Steve Williams - the man who helped Tiger Woods win an amazing seven times in nine visits at this same venue - Scott's supreme ball-striking, clever course management and solid putting proved a devastating mix.

A birdie at the last helped him finish four clear of England's Luke Donald, who ended in a tie for second place alongside Rickie Fowler after they both carded rounds of 66.

Scott was caught by fellow Australian Jason Day and then by Japanese teenager Ryo Ishikawa on three separate occasions in Sunday's final round, but responded each time.

The 31-year-old birdied the long second, then matched Ishikawa's birdie on the 10th after starting the back nine with a one-shot lead.

Scott opened up a two-shot gap by chipping in from 15 feet at the short 12th and increased his stranglehold with another birdie at 14 to pull further clear.

With Donald and Fowler both making birdie at 18 to set the clubhouse target at 13-under, Scott just needed to avoid any late disasters over the closing three holes.

His wedge over water at 16 was a little close for comfort but a par there and another at 17 left him with a three-shot lead playing the last.