Luke Donald denied Graeme McDowell the chance to soar to a career-best third in the world when he beat new No 1 Martin Kaymer 3 & 2 in a low key final of the WGC-Accenture Match Play Championship at Dove Mountain.
The Englishman (33) looked certain to race to an early victory when he went three up after just five holes in Arizona.
But while Kaymer took advantage of some errors by Donald to level the match at the turn, the German (26) was far from his best.
After picking up his first win in the US since 2006, Donald said: "It feels amazing. I've had a bit of a monkey on my back for the five years and it has been a lot of sweat and tears to get to this point."
Donald edged back in front at the par-five 11th, where Kaymer missed a five-and-a-half footer.
Kaymer handed Donald the 208-yard 12th, where he pushed his tee shot into the desert waste before the Englishman went three up with three to play with a chip and putt birdie at the driveable 15th, where Kaymer missed a three-and-a-half footer for par.
Kaymer, who took over from Lee Westwood as world No 1 courtesy of Saturday's semi-final victory over Bubba Watson, conceded on the 16th green.