Jordan Spieth was tied for the lead at Carnoustie as he tries to become the first repeat victor in 10 years at the British Open.
The 42-year-old began the day on level-par for the tournament but took full advantage of ideal scoring conditions to collect six birdies from his first 14 holes.
Americans Kevin Kisner, Kevin Chappell and Xander Schauffele were also five under with nine to play, with Rory McIlroy a shot further back after a three-putt bogey on the 12th.
On a day when Woods electrified the gallery with a 66 that pulled the 14-major victor within four strokes of the lead, Spieth, with three majors already, showed again that he is the man to beat of the next generation. "Hopefully, I can go out and play well again (Saturday), and then that will be a big chance going into Sunday". He won the last of his 14 Majors at the 2008 US Open and has been beset by injuries and personal strife since.
But just when one of the greatest sporting comebacks of all time seemed on the cards, Woods failed to pull off a risky flop shot to get out of trouble on 11.
Woods was happy with the start to his 20th British Open and third at Carnoustie where he was tied for seventh in 1999 and finished 12th in 2007, although he felt it could have been even better had he taken advantage of the par fives. I wish I could have taken the last four holes back, but it is what it is.
England's Justin Rose (64) and Japan's Yusaku Miyazato (65), playing ahead of him, showed just what was possible in calm conditions with the fairways and greens holding the ball much better following the rains on Friday.
"I've always wanted to battle it out with Tiger in a major - who hasn't?"
A deafening roar reverberated around the course when he sunk a long birdie putt on the fourth to move to within three of the lead along with playing partner Francesco Molinari. "Maybe my wedge play wasn't quite as good as it should have been, but I gave myself plenty of chances". "It's been a few years since I felt like this". But before that, he briefly had the golf world buzzing when he reached the green on the Par 5 14th in two and two-putted for a birdie and a share of the lead.
At 5 under overall, Woods was two shots off the lead. - Agencies This is the best birthday present for myself, playing in The Open and the weather was flawless today.
"I really didn't feel like I really made a bad swing until 18".
"There you go, " Johnson said. "I've made a lot of progress over the year. and I've got an opportunity to make it a very memorable one".
"I've been called "Dustin" many times", Zach Johnson said after shooting a 4-under-par 67 Friday to get to 6-under for the tournament.
It was his best score in a weekend round of a major since the 2010 U.S. Open at Pebble Beach.