Rahm wins third DP World Tour Championship, McIlroy secures fourth top ranking
An excellent final round of 67 saw Jon Rahm seal the third DP World Tour Championship of his career on Sunday.
As a result, McIlroy ends the year as DP World Tour number one for a fourth time, winning the Harry Vardon Trophy.
Rahm looked to be in the mood to secure victory after recording birdies on each of the first three holes, only to bogey the fourth, leaving Noren breathing down his neck as the Swede also started brightly to go within one of the lead.
Things turned on the seventh hole though as Noren dropped a shot, before Rahm gained one to extend his advantage to three.
Hatton went on to set the clubhouse lead at 18 under, but Rahm did not drop another shot as he tidied up his round with further birdies at the 13th and 15th before confirming his win with a simple par on the 18th.
After his victory, Rahm said it was a "very" special one, adding: "Because of coronavirus I never got the chance to defend my 2019 title, even though I decided not to come last year I came in with the mentality [this year] that nobody beat me in the last two years, so they're gonna have to beat me again.
"I like this course and this course likes me, so I hope this is the third of many more."
McIlroy was equally pleased with his own award, with the world number one becoming just the second player in history to win the PGA Tour's FedEx Cup and the DP World Tour order of merit in the same season.
After his final round of 68, McIlroy said: "It means a lot, it's been seven years since I've last done it [finished top of European Tour rankings] and obviously this is my fourth one.
"I was a model of consistency through the year, a lot of top finishes, I think my worst finish was 12th in Abu Dhabi, so just a really consistent season, kept putting in good performances; it would have been nice to get one win in there at the end of the year here but Jon played an incredible tournament and fully deserved it."
Elsewhere, English pair Tommy Fleetwood and Matt Fitzpatrick finished joint-fifth on 13 under, while Dane Rasmus Hoejgaard shot 67 to move up to joint-seventh with Pole Adrian Meronk on 11 under.