Tiger Woods was in imperious form as he surged into the lead during the final round of the World Golf Championships - Bridgestone Invitational, but Ireland's Padraig Harrington fought back to level pegging on the back nine.
Woods picked up five shots over his first nine holes at Firestone Country Club to go from three behind Harrington to two in front.
The World Number One wasted little time reducing the deficit on Ireland’s three-time Major winner when they teed off in the final pairing - eagling the par five second while Harrington scrambled to make par.
Consecutive birdies at the fourth and fifth put the American in front for the first time this week and he double his advantage with another birdie at the ninth after a delightful approach from the rough.
Harrington was not at his most accurate but battled hard to par all nine holes on the way out to stay in contention.
Open Championship winner Stewart Cink picked up four shots across his first 12 holes to reach eight under and move into third place.
Lee Westwood’s spectacular round of 65 on the 7,300 yard par 70 South Course took him to five under for the week and vaulted the Englishman into the top ten.
Harrington proved he was not going to be a pushover like so many of Woods' final round victims of the past when he clawed a shot back at the par four 11th to move to 11 under and the Irishman was soon on level terms.
Woods bogeyed the 13th after missing the missing the green with his second shot and then two putting from 15 feet to fall back into a share of the lead at 11 under with five holes to play.