Thoughts of a Dustin Johnson runaway at the Tour Championship were dispelled when he faltered late to fall back into a tie for the third-round lead with fellow American Kevin Chappell here Saturday. Johnson, the hottest player in the game coming off a victory, squandered a chance to take a stranglehold on the tournament when he double-bogeyed the par-four 17th, compounding a poor drive by clipping a pine tree with his second shot. He was on the wrong end of a three-shot swing as Chappell birdied the same hole from 10 feet. US Open champion Johnson steadied the ship to birdie the par-five 18th for a one-under-par 69, his eighth consecutive round in the 60s but one that left him ruing what might have been. "This course is very difficult off the tee and I missed a couple of drives on the back nine and made a couple of bogeys and a bad double bogey there on 17," he said before accentuating the positives. "I'm happy with my position. I felt like I played well today. A couple of loose drives and it's easy to make bogeys around here ... so if I make a mistake I don't let it bother me." Chappell fired 68 to join Johnson at eight-under 202. Johnson's stumble let a bunch of players back into the hunt, with Northern Irishman Rory McIlroy (66) and American Ryan Moore (66) two shots behind, and Japanese Hideki Matsuyama (68) three back despite a triple-bogey at the 14th. Johnson, top seed in the FedExCup standings, will clinch the season-long points race and its $10 million bonus if he wins the tournament on Sunday. But Chappell, 15th in the standings, is unlikely to claim the FedExCup top prize even if he wins the tournament. He is a three-time runner-up on the PGA Tour this year. McIlroy, sixth in the points list, gave himself a crack at the $10 million with three birdies in the last six holes. South African Charl Schwartzel posted consecutive eagles, the second from 140 yards out at the par-four seventh, in carding 66 to vault within five shots of the lead. Chan wins in Tokyo Taiwan's Chan Shih-chang shot a stunning final-round 62 to win the Asia-Pacific Diamond Cup by two strokes Sunday at Osaka's Ibaraki Country Club. The 30-year-old's flawless eight-under-par round saw him finish on 10-under 270 and take the winner's check for $294,204, almost double his entire 2016 Asian Tour earnings of $149,453 heading into the tournament. In second place on eight-under 272 was Japan's Ippei Koike who carded a one-under 69 to finish a stroke ahead of countryman Kazuhiro Yamashita (68). — Agencies