Eddie Pepperell won his first ever European Tour title
The 27-year-old Englishman carded 18-under to hold off compatriot Oliver Fisher at the Doha Golf Club.
And Pepperell admitted he was ready for a big red wine session after four days in the heat of Qatar.
Pepperell told Sky Sports: "I need a glass of wine and more than that I think!
"What a day. Oli made it really tough and I made it tough for myself at the end there with the second shot on 18. I felt good all day, I was in a great place mentally and kept telling myself I'm going to win this and Oli certainly made life more interesting.
Eddie Pepperell banked a decent cheque from winning at the Qatar Masters
"Relief I guess is the number one emotion, as is always the case with a win - although I haven't had many."
Sweden's Marcus Kinhult carded a closing 68 to finish third on 16 under, with Renato Paratore, Pablo Larrazabal, Gonzalo Fernandez-Castano and Gregory Havret all a shot further back.
Fisher would have forced a play-off with a birdie on the last but missed his 10 feet putt to hand Pepperell his maiden victory on the tour.
Pepperell finished the final round 2 under 70 after being the joint-leader overnight.