A bogey at the 17th hole cost Hideki Matsuyama the outright lead at the Hero World Challenge and handed Dustin Johnson a share of first place after two rounds, with JB Holmes crumbling and Tiger Woods making a move.
Matsuyama, who won the WGC-HSBC Champions in October, was one shot adrift of overnight leader Holmes at the start of play in the Bahamas on Friday, but paid the price for dropping a shot in the final stages of his second round.
The Japanese posted gains on the third and ninth holes before sinking four birdies between 11 and 15, while an impressive putt on the par-four 13th made him the only player to pick up a shot on the hole that day.
But a bogey on the 17th meant his five-under round of 67 placed him level with U.S. Open champion Johnson on 12 under for the competition.
Johnson eagled the par-five 11th, but dropped a shot on the following hole, though a cool birdie at the last kept him in contention.
Holmes appeared to be building on a solid start at four under through 11, but he found the water and produced a double bogey on the par-three 12th.
Golf is hard. pic.twitter.com/ykqTGDK55j-- PGA TOUR (@PGATOUR) December 2, 2016
The overnight leader dropped another shot on the 16th and finished with a triple-bogey for a one-over 73 that sent him tumbling down to joint seventh with Jordan Spieth.
After a mixed round on the first day of his return following more than 15 months out due to back problems, former world number one Woods was back in fine form for his second round.
Playing alone following the withdrawal of Justin Rose with a back problem of his own, Woods carded a flawless six-under 65 to take a share of ninth with Rickie Fowler and Open champion Henrik Stenson.
These two will tee it up together tomorrow. pic.twitter.com/ZidfSvjVOI-- PGA TOUR (@PGATOUR) December 2, 2016
However, Bubba Watson was the star of the day. He eagled two of the three par-fives on the front nine to reach the turn at seven under, though a bogey at the 12th stopped him joining Matt Kuchar and Louis Oosthuizen in third.