Hideki Matsuyama stormed home to grab a three-way share of the first round lead at the Memorial Tournament in Dublin, Ohio on Thursday while five-times winner Tiger Woods toiled with back tightness before rebounding to finish seven shots back.
Matsuyama was riding a streak of four straight birdies when he holed out for eagle from 137 yards at the par-four 17th en route to a seven-under 65 that left him tied with Chile's Joaquin Niemann and Mexico's Abraham Ancer at Muirfield Village Golf Club, one shot clear of Beau Hossler.
World No 10 Matsuyama, the 2014 champion, reached the turn at three-under after a trio of birdies but then briefly stumbled with two consecutive bogeys from the 10th before coming home in stellar fashion.
Tiger Woods toiled with back tightness before rebounding to finish seven shots back
Ancer, who joined the PGA Tour in 2016 and enjoyed a career-best share of eighth at the Houston Open this season, and 19-year-old Niemann, the former top ranked amateur in the world, each mixed eight birdies with one bogey.
Former world number one Woods arrived at Muirfield with big expectations after his solid Players Championship