Kristoffer Broberg claimed his first European Tour title at the BMW Masters with a dramatic play-off victory over Patrick Reed.
The Swede came into the final round two shots off the lead but turned in 33 to hold a share of top spot and a single birdie on the back nine got him to 17 under.
Playing partner Reed had been off the pace but picked up four shots in four holes from the 13th, including a spectacular eagle on the 15th, to move into the box seat and take a one shot lead onto the 17th tee.
But he dropped a shot on the 17th and as the chasing pack failed to close in, the leading duo parred the last to send the tournament to a two man play-off up the 18th.
Reed put his second shot into the bunker and although he played an excellent recovery for par, he could only watch on as Broberg rolled in a 15-foot putt down the hill to add a European Tour title to his four Challenge Tour triumphs.
That's a dream come true. I've worked so hard all my life for this - Kristoffer Broberg
"I didn't trust myself, a few weeks ago; I could never win here. I was just so down, and I'm so happy right now.
"When I won on The Challenge Tour - once in a play-off in Norway - the players out there are really, really good and this field is just a really good field.
"So I'm just happy to beat all of them. This means a lot to me."
Broberg was full of praise for Reed, who pushed the 29 year old all the way before eventually succumbing on the 18th green.
"His short game was unbelievable all day," he said. "I'm playing really good the front nine and I was struggling a bit, a little nervous on the last few holes. The four last holes I was really, really nervous.
"I get to the play-off and I saw him hit it right. And I hit it a really good drive on the left side and thought, 'here is my chance, I want to get by the trap'.
"I hit a good nine iron up to four or five metres from the hole and was so happy."
The third event of The Final Series went to a play-off for the second consecutive season following Marcel Siem's dramatic chip-in win last year and the closing round was full of drama once again.
Thongchai Jaidee had begun the day with a one shot lead and he had a putt on the last to force his way into the play-off, as did Byeong-hun An, but both men had to settle for a share of third at 16 under alongside Lucas Bjerregaard and Henrik Stenson.
Justin Rose was then a further shot back alongside countryman Paul Casey with Julien Quesne and Søren Kjeldsen, who shot a low round of the day 64, at 14 under.
With Race to Dubai leader Rory McIlroy not present in Shanghai, the week presented an opportunity for some of the chasing pack to overtake the Northern Irishman heading into the season-ending DP World Tour Championship, Dubai.
But none of them could, with closest rival Danny Willett finishing in a tie for 28th at seven under and closing the gap to just 1,613 points.
Jaidee was soon caught by Bjerregaard who birdied the first with playing partners Reed and Broberg also getting off to the ideal start.
Bjerregaard then made it a birdie-birdie start to move out in front on his own at 16 under while a bogey from An on the second dropped him to 13 under.
But Broberg was heading in the other direction, birdieing the fourth to move into a share of second, and he was soon there on his own as Jaidee, after brushing the edge on the two previous holes, dropped a shot on the fourth.
Reed birdied the fifth to get to 14 under but it was Bjerregaard who was making all the running and a third birdie of the day handed him a two shot lead.
Casey had turned in 34 but it was all change at the top when the penultimate group reached the eighth.
Bjerregaard found a bunker off the tee and his second shot ended up underneath a bridge forcing him to take a drop which resulted in a bogey. Broberg, meanwhile, put his second shot to eight feet and made a birdie to move out in front at 17 under.
A bogey on the ninth saw him drop back to 16 under with Bjerregaard, with Casey picking up another shot on the tenth to get to 15 under.
Bjerregaard dropped a shot on the 12th and a birdie from Casey on the 13th moved him to the top of the leaderboard for the first time in the final round.
Bjerregaard then bounced straight back with a birdie and when Sergio Garcia drained a 25-footer for eagle on the 13th, there was a four-way tie at the top.
That did not last for long, though, as Broberg put his approach on the 14th inside two feet and moved to 17 under.
Reed was another who had taken advantage of the 13th but he would make the most of the next par five in spectacular style. His second shot on the 15th had found the sand but he played his third past the hole and spun it into the cup for an eagle and a share of the lead.
The 25 year old was out in front on his own with a birdie on the 16th but missed a five-foot par putt on the 17th to drop back into a share of the lead.
Stenson had made a remarkable late charge to get into contention after being one over for the day stood on the 11th tee, birdieing the 11th, 13th, 14th, 15th and 16th to move right up the leaderboard. But he could not find the birdie he needed on the last two holes.
Casey's chances disappeared as he found the water on the 18th for a closing bogey while Garcia dropped three shots in his final two holes to fall away.
Jaidee and An birdied the 17th to reignite their chances but neither they nor Bjerregaard could make the birdies they needed on the last and the dramatic finale between Reed and Broberg was set up.
Rose could have moved to the top of the Race to Dubai had he finished second but he closed with a 67 containing six birdies and a bogey to seal a share of seventh alongside Casey.
Quesne finished with a 66 to sit alongside Kjeldsen and one shot clear of Ian Poulter, who dropped two shots in his last four holes, and Garcia.
Matthew Fitzpatrick was 12 under to continue his recent good form but he could not seal a tenth top ten of the year and shared 13th place with Ross Fisher, Marcus Fraser and Thomas Pieters.
