The 43-year-old Englishman struggled to adapt to what he described as the "soulless" playing environment during the pandemic, with his only top-10 finish in 2020 coming at the US PGA Championship when he tied for second behind Collin Morikawa.

He travelled to Dubai having not played on the European Tour since the end of 2019 and, aided by a new driver and a new mindset, wound up easing to his 15th victory on the European Tour – 20 years after his first – after shooting a two-under 70 in the final round.

"It's something very cool because it's not been great," said Casey, who could jump to 14th in the world rankings after his first win since the European Open in September 2019.

"I didn't enjoy my golf in 2020. I mean, I played well one week but that was about it.

"It's been totally soulless. No emotion. A whole bunch of feelings. I've not enjoyed it. And I've realised how much I love doing what I do, but I love doing it in the environment with people watching and the crowd and the noise.

"From 2020 to now, here, I'm rejuvenated. I feel totally different." – Paul Casey

"It can be heckling, it can be cheering and seeing the emotion on people's faces and some people are rooting for the guy standing next to you, and some people are rooting for you. It's just everything."

Just having some people beside the fairways at Emirates Golf Club made him feel more alive.

"From 2020 to now, here, I'm rejuvenated," Casey said. "I feel totally different."

Casey began the day with a one-shot lead over Robert MacIntyre, and built a five-stroke cushion with seven holes to play after his Scottish playing partner made four straight bogeys from the 7th.

Walking down the 18th with a three-stroke lead, Casey could enjoy one of his favourite shots in golf – the approach to the par-5 18th with the backdrop of the Dubai skyline – and he two-putted for birdie to finish the tournament on 17-under-par 271.

South Africa's Brandon Stone shot an even-par 72 to climb into second place. MacIntyre placed third after a 74.

A final round of 71, ruined by a double bogey seven on the final hole, saw Australia's defending champion Lucas Herbert end on a five-under total in joint 22nd place.

Compatriot Wade Ormsby finished alongside Herbert after also shooting a 71 while Jason Scrivener, who was second in Abu Dhabi last week, ended up joint 41st after his final round 72 left him at two under overall.