Englishman Fleetwood, 27, who needed to win at the Jumeirah Golf Estates to overtake Molinari in the European Tour's money list, finished with a final-round four-under 68 to end tied for 16th on 10-under 278 overall, eight shots behind eventual victor Willett.
Having won his first major and the Ryder Cup this year, the Italian has been named the best European golfer after winning the Race to Dubai title. I'm pleased to have won the tournaments that I've won over the last few years. Take the final group, where Masters champion Patrick Reed is tied for the lead with the man who won the green jacket in 2016 and then fell off the map. Another Englishman, Matt Wallace, is also only two adrift as he seeks his fourth win of the season. Find us on Facebook too!
"When I met up with Foles (coach Sean Foley) at last year's US PGA I was pretty low and open to trying anything and that from day onwards we've been on a good path and elongating a career that would have been disappointing to stop after five years because of being injured".
This morning on the first tee, the announcement of the victor of The Open Championship, Race to Dubai leader. doesn't sound real at the moment.
Molinari has enjoyed a remarkable season, winning his maiden Major at The Open along with his first Rolex Series title at the BMW PGA Championship.
Niño se suicida tras regaño y castigo en la escuela, en Francia
Seguramente durante tu infancia en más de una ocasión hiciste coraje y hasta berrinche al ser regañado en la escuela. La madre y el padre del niño llegaron al lugar donde sus compañeritos lo habían visto por última vez.
He is the first Italian to ever become European number one, and has also climbed from 21st in the world rankings to seventh.
"I'm not very proud of this week for the way I played but obviously I will remember it for a long time for winning The Race to Dubai".
Fleetwood admitted his chances of lifting the trophy had disappeared with a lifeless 74 which left him just a shot ahead of Molinari but, more significantly, eight strokes behind Willett and Reed on a densely-packed leaderboard.
At the start of the week it was just defending title holder Tommy Fleetwood who had the potential to stand in the path of Molinari's hopes of becoming European No.1, a fitting end to a Ryder Cup year that will be remembered for the 4-0-0 partnership of "Moliwood".
"It's just an incredible achievement again. If not, I still want to finish next season feeling like I'm a better player".