Patrick Reed made it hard for anyone to question his moxie.
A week that began with Brooks Koepka saying he thought Reed cheated when he was penalised for swiping sand in the Bahamas ended with Reed delivering clutch moments down the stretch to win the Mexico Championship on Sunday.
Then again, Reed always seems to be at his best when it feels as though the world is against him.
Two shots behind with four holes to play, Reed ran off three straight birdies to overtake a faltering Bryson DeChambeau, closing with a four-under 67 for his second World Golf Championships title.
Reed made it interesting with a wild tee shot into the trees on the last at Chapultepec Golf Club, forcing him to chip back to the fairway. He had to two-putt from 35 feet for the eighth victory of his PGA Tour career.
In a final round in which five players shared the lead - and four were tied heading for the back nine - DeChambeau appeared to seize control with five birdies.
Everyone around him faltered - Justin Thomas, Rory McIlroy, Jon Rahm, Erik van Rooyen - but Reed played bogey-free until he only needed a bogey to win.
"At the end of the day, you can't listen to what other people are saying. All you can control is what you do." - Patrick Reed.
Reed never flinched with all that was happening on and off the course.
He has yet to shake whispers on the Tour and heckling from the gallery over the World Challenge in December, when video caught him twice swiping away sand behind his ball in a waste area.
Koepka became the strongest voice during an interview Monday with SiriusXM in the Bay Area while he was previewing his title defence at the PGA Championship in May.
Asked whether he thought Reed was cheating, Koepka replied: "Uh, yeah. I think, yeah, yeah.
"I mean, I don't know what he was doing, building sand castles in the sand. But you know, you know where your club is. I mean, I took three months off and I can promise you I know if I touched sand.
"If you play the game, you understand the rules," he said. "You understand the integrity that goes on. I mean, there's no room for it."
Asked about it Saturday after his round, Reed said: "At the end of the day, you can't listen to what other people are saying. All you can control is what you do."
All he did Sunday was win.
"To come back and win my second World Golf Championship, especially with how I had to finish from basically 15 onwards ... last hole was ugly but it was what I needed just to get the job done," Reed said.
He finished at 18-under 266 and moved to No. 8 in the world.
Cameron Smith was the best-placed Australian with a five-under-par total of 279. His final round 64, the equal best for the day along with Brandt Snedeker, earned him a tie for 22nd.
Genesis Invitational winner Adam Scott was a shot further behind with a final round 70.
- Doug Ferguson, Associated Press