Justin Thomas closed out his first win of the year with a three-stroke victory at the BMW Championship on Sunday.

Thomas made waves at Medinah with his record-breaking round – a 61 – on Saturday and the American backed it up.

The 2017 US PGA Championship winner carded a four-under 68 in the final round to get to 25 under, winning the tournament and moving top of the FedEx Cup standings heading into the Tour Championship.

The win was Thomas' 10th career PGA Tour title and it came with some impressive shots.

He had a string of birdies through his back nine, four through his last eight holes, to help keep the rest of the field at bay.

Thomas held off a red-hot Patrick Cantlay and Hideki Matsuyama, who both matched or shot their lowest rounds of the week.

Cantlay finished solo second (22 under) after nine birdies helped him to a seven-under 65. He was mere inches away from putting even more pressure on Thomas but just missed an eagle putt after driving the 15th green.

Matsuyama had the lowest round of the day with a 63 to jump into third place at 20 under. The 36-hole leader had set the previous record at Medinah before Thomas broke it on Saturday, and got back to form on Sunday.

He was mistake-free through the front nine with five birdies and matched that after the turn. However, a bogey on the par-four 16th stopped Matsuyama from besting his low round of the week.

Tony Finau finished in fourth place at 18 under while Jon Rahm and Brandt Snedeker tied for fifth at 16 under.

Corey Conners and Lucas Glover both placed seventh at 15 under and Adam Scott and Kevin Kisner rounded out the top finishers in a tie for ninth at 14 under.

Justin Thomas set a new course record in the third round as he stormed to the top of the BMW Championship leaderboard.

Thomas carded an 11-under-par 61 to shatter the record at Medinah Country Club for a commanding six-stroke lead on Saturday.

Hideki Matsuyama had set the record on Friday, but his feat was eclipsed by 2017 FedEx Cup champion Thomas – who stole the show with two eagles and eight birdies.

Thomas birdied his opening five holes and had six through his first eight, before adding another two and a pair of eagles on the back nine.

The American is set to move top of the FedEx Cup standings as things stand, with Thomas 21 under after three rounds – ahead of Tony Finau (68) and Patrick Cantlay (68).

"I just hope the trend doesn't [continue] and someone else breaks [the course record] tomorrow," he said after his stellar round.

"It's just one of those freaky days where you get in the zone. I hit the ball pretty unbelievable. I didn't really — it's not like I made any long putts, I just hit it close to the hole and took advantage of some opportunities when I had them and got a couple good breaks."

Rory Sabbatini posted a five-under-par 67 to be fourth and seven shots adrift, while Jon Rahm (66) is a stroke further back heading into Sunday's decider.

Brandt Snedeker (67) highlights a trio of golfers tied for sixth (12 under) and Rickie Fowler (68), Kevin Kisner (69), Xander Schauffele (70) and Matsuyama (73) all sit ninth.

Former world number one and 2012 champion Rory McIlroy is 11 shots behind Thomas following his third-round 70, while Tiger Woods is three shots back.

Two-time FedEx Cup champion Woods climbed the leaderboard thanks a to a bogey-free 67, which left him in a tie for 31st.

Only the top 30 players in the FedEx Cup standings will advance to the Tour Championship and Woods – who is the defending champion – is projected to finish 40th.

Dustin Johnson opened the Northern Trust with an impressive eight-under 63 as Troy Merritt took a one-stroke lead on Thursday.

Johnson, a two-time champion of the event, sits outright second after a bogey-free first round that included eight birdies.

The world number two made four birdies on his front nine before four straight beginning at the fifth hole at the first event of the FedEx Cup play-offs.

"It's a golf course I like. We played here in the Presidents Cup a couple of years ago and I've played a couple of other events here," Johnson said.

"I really like the golf course. I think it sets up well for me, and with the conditions, you've got to hit really good shots if you want to get it close to the hole, but with the soft conditions, you can be kind of aggressive."

Merritt carded a nine-under 62 to grab the lead as the American also fired a bogey-free opening round in New Jersey.

He tied a Liberty National Golf Club course record with his round, which featured nine birdies.

"We're in a good position now to contend for the championship," Merritt told reporters after his round.

"That's why we tee it up each week. Obviously this week, it's a little bit different with just trying to get into next week … and now we can shift our focus from winning the golf tournament."

Kevin Kisner and Jon Rahm are tied for third after shooting seven-under 64s in the opening round, sitting a shot ahead of Tony Finau, Webb Simpson, Rory McIlroy and Justin Rose.

Jordan Spieth made a solid start with a 67 and world number one Brooks Koepka opened with a 70 as Tiger Woods struggled.

Woods is back in a tie for 116th after battling to a four-over 75 that included a double bogey and five bogeys.

Defending champion Bryson DeChambeau is tied for 33rd after shooting a three-under 68.

Jon Rahm used a brilliant opening round to grab a three-stroke lead at the WGC-FedEx St. Jude Invitational on Thursday.

Rahm, who is fresh off a tied for 11th finish at The Open, shot an eight-under 62 with five of his eight birdies coming on his back nine at TPC Southwind.

What was more impressive was his putting as Rahm missed just one putt inside 25 feet during the first round in Memphis, Tennessee. He was a perfect five for five from 15-20 feet.

The Spaniard, still looking for his first WGC win, tied the low round of his PGA Tour career.

But, he has a star-studded field behind him.

There is a five-way tie for second place at five under, with Hideki Matsuyama and Bubba Watson joined by Patrick Cantlay, Cameron Smith and Shugo Imahira.

Watson's round featured a birdie on his final hole after bogeys on the par-four 10th and 13th holes.

Behind them is a sizable group of Ian Poulter, Thorbjorn Olesen and Tyrrell Hatton, among others, a shot further back.

Justin Rose, Bryson DeChambeau and Billy Horschel are in a five-way tie for 13th at three under and in good position to move up the leaderboard on Friday.

Jordan Spieth nearly joined the top of the leaderboard after five birdies and just one bogey through 11 holes.

But the American then carded two triple bogeys, making seven at the 12th and 15th holes before finishing with an even-par 70.

World number one Brooks Koepka made a fine start with a 68, while Rory McIlroy and Dustin Johnson opened with 69s.

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