Anirban Lahiri staggered to a disappointing seven-over 79 on a windy day as he dropped sharply from a possible top-10 finish to tied-28th at the World Golf Championship here. (Anirban Lahiri Rises to Seventh on a Breezy Day at World Golf Championships)
Lahiri, starting the day at five-under and in tied-seventh place, slipped to tied 28th at two-over.
He was done in by a five-hole stretch from third to seventh holes, when he bogeyed all five of them, finding either rough or one of the bunkers.
With the wind blowing 15-20 mph, Trump National Doral began to show its teeth and played the toughest it had all week, nearly a full two strokes over par.
The lone bright spot in the day was a 22-foot birdie on 17th and despite a lower-than expected finish, he still moves up on the FedEx Cup ladder to 92nd, up from 104th at the start of the week.
Lahiri will now take a break and return to India to defend his Hero Indian Open title. After which he would go back to USA for the PGA Tour and the Masters next month.
Meanwhile, the 35-year-old Adam Scott, continued his blistering run, as he added the WGC-Cadillac to make it two wins in two weeks.
Scott, who finished second in Northern Trust Open and then won the Honda Classic last week, maintained his form and moved to No. 6 in the world. He shot 69 to finish at 12-under 276 for the week and moves to the top of the FedExCup standings with the win.
Scott, who had two double bogeys in first five holes, played his last 13 holes in six-under and overtook Rory McIlroy and the rest for a second WGC title in his career.
It was also his 13th PGA Tour win. Bubba Watson (68) was second, one shot behind at 11-under, while Danny Willett (69) and McIlroy (74) were tied third at 10-under and Phil Mickelson (70) was fifth at nine-under.
Lahiri opened with a pair of pars before running into rough weather when he found only 50 per cent of the fairways and found a lot of bunkers and roughs. He managed to scramble successfully only once in five times and missed a few putts too.
Lahiri had six bogeys, a double bogey on 16th, when he not only went into the bunker twice but also missed a bogey putt. He had just one bogey.
Scott went from three down at the start of the afternoon, to two down after one hole, to six back after five and finally when the dust had settled over Trump National Doral he was right on top and one ahead of Watson.