Tiger Woods was left frustrated not to get more out of his round after making an encouraging start to the Memorial Tournament in Ohio.
The world No 5 overcame a frustrating front-nine and seeing his group being put on the clock to post a two-under 70 and stay within five strokes of early pacesetter Ryan Moore.
Woods reached the turn in level-par when his group containing Justin Rose and Bryson DeChambeau were warned for slow play, before the 43-year-old mixed three birdies with a bogey over his closing five holes.
"That [being put on the clock] was frustrating," Woods said. "That made things a little more complicated. It's one of those things where it's a group effort to try and get back into position.
"In the group ahead of us; JT [Justin Thomas] doesn't take a lot of time, Rory [McIlroy] plays quick and Jordan [Spieth] was seven under, so they were obviously playing fast and we were not.
"It could have easily been a few better than that. I hit a couple of loose irons early but hung in there and turned it around at the end."
Looking to bounce back from a missed cut at the PGA Championship, Woods rolled in an eight-foot birdie at the 11th but gave it back after failing to get up and down from a greenside bunker to save par at the 13th.
Woods opened his second nine by holing a clutch 10-foot par at the first and saw his run of pars ended with a two-putt gain at the fifth, before cancelling out a blemish at the next with back-to-back gains from the seventh.
Playing partners DeChambeau and Rose shot scores of 74 and 75 respectively, while Rory McIlroy sits 10 strokes off the pace after carding two double-bogeys in his opening-round 75.
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