Jon Rahm carded a closing 67 to win the DP World Tour Championship, Dubai as a late slip from Justin Rose handed Tommy Fleetwood the Race to Dubai title.
Rose had looked on course to claim both the eighth Rolex Series event of the season and the Race to Dubai as he turned in 32 at Jumeirah Golf Estates, but three bogeys on a dramatic back nine brought him back to the pack and opened the door for Rahm.
The Spaniard came home in 33 to get to 19 under and win his second Rolex Series title by one shot, with Rose slipping back into a tie for fourth that was not good enough to overturn Fleetwood's 256,737-point advantage in the Race to Dubai Rankings presented by Rolex.
Fleetwood signed for a closing 74 to finish in a tie for 21st and end a season that has brought wins at the Abu Dhabi HSBC Championship and the HNA Open de France as Europe's Number One.
Rahm - who was handed the Sir Henry Cotton Rookie of the Year award during the week - added this win to his Dubai Duty Free Irish Open Hosted by the Rory Foundation title and became the first player to win multiple Rolex Series events.
"It's hard to sum it up," said Rahm. "An incredible week, I could not be more proud of what I've done this week. It could be very easy to just be content with getting the award and just being here and trying to play the best.
"Having the weekend that I've had, actually shooting 12 under on the last 36 holes, bogey-free round today, it's really special.
"I didn't plan on being here at the beginning of the year and I sure didn't plan on winning it so it's an incredible feeling."
Fleetwood finished bogey-bogey but with Rose needing to finish alone in fourth to catch him at that point, the 26 year old remained in the ascendancy.
Rose found a fairway bunker off the 16th tee and when he came up short of the green and failed to get up and down, he was left needing an eagle on the last to get into a tie for second.
He made a birdie to sign for 70, but it was ultimately disappointment for the man who was seeking his third win in a row.
However, Fleetwood expressed his belief that end-of-season glory in 2017 could be the springboard for more success.
"My ultimate goal in life is to be the best player in the world," said Fleetwood. "That will always be the same. Whether I achieve it or not is another thing but I'll always strive for that.
"I think this year has been a big year in terms of my career. Some of the performances, I have put myself on the world stage a bit more.
"When we sit down after this year we'll make sure that the goals get high and lofty and that I push myself to achieve more.
"I've got a lot of experience in me after the last two, three years. I know that you can go down the wrong path very easily and I think I've got people around me and myself included that know how to stay on the right path, hopefully."