(CNN) —
PGA Championship winner Brooks Koepka has set his sights on a period of domination after securing his fourth major title at Bethpage Sunday.
The 29-year-old retained the Wanamaker Trophy to become the first player to win his first four majors inside two years and he is confident he has more to offer.
“Double digits, easy! I don’t see why I can’t get to double digits,” he told CNN Sport’s Don Riddell when asked how many majors he can win during his career.
“I got four now, I’m 29, and they say you don’t peak until you’re in your thirties. So, hopefully, I peak then.”
READ: Brooks Koepka clinches fourth major at PGA Championship
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Brooks Koepka retained the PGA Championship in 2019.
The Floridan was in a league of his own for most of this year’s PGA Championship, going into the final day with a healthy lead of seven shots.
Despite a late surge from close friend Dustin Johnson, Koepka managed to hold his nerve to win with two shots to spare.
“I was up against the ropes, it wasn’t easy. It wasn’t fun,” he said, describing his mini-meltdown when he dropped four straight shots on the last day.
“I wasn’t afraid. I mean I always had a lead, so what’s there to be afraid of.”
If anything, the pressure made the win that bit sweeter.
Despite two US Open titles and a PGA Championship already to his name, Koepka struggled to contain a rare show of emotion on the 18th green.
“It was special. To see that putt drop it was absolutely incredible,” he said after clinching the win.
“The emotion I had was something I’ve never experienced as a golfer, something you don’t see very often, even with me.
“I’m emotionless, I can be stoic at times but that one meant more to me than I think people will ever know.”
Photos: In pictures: The 2019 PGA Championship so far
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Brooks Koepka successfully defended his PGA Championship title after a thrilling finish at Bethpage Black.
Photos: In pictures: The 2019 PGA Championship so far
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Patrick Smith/Getty Images
The 29-year-old clinched his fourth major in eight events after overcoming a late wobble at Bethpage.
Photos: In pictures: The 2019 PGA Championship so far
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Ross Kinnaird/Getty Images
Koepka led by seven ahead of the final day but four straight bogeys on the back nine let in his close friend and the then world No.1 Dustin Johnson, who narrowed the gap to one.
Photos: In pictures: The 2019 PGA Championship so far
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England's Matt Wallace was in the chasing pack well behind the leading two at Bethpage.
Photos: In pictures: The 2019 PGA Championship so far
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Popular veteran Phil Mickelson is a fan favorite in New York.
Photos: In pictures: The 2019 PGA Championship so far
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Stuart Franklin/Getty Images
Koepka said the back nine was "very stressful" as he battled his own mistakes and the pressure exerted by Johnson.
Photos: In pictures: The 2019 PGA Championship so far
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Seth Wenig/AP
Japan's Hideki Matsuyama of Japan chips onto the 13th green during the final round of the PGA Championship.
Photos: In pictures: The 2019 PGA Championship so far
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Tyrrell Hatton of England makes a shot out of the rough amidst the gallery on the ninth hole during the final round.
Photos: In pictures: The 2019 PGA Championship so far
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John David Mercer/USA TODAY Sports
Three-time champion Jordan Spieth finished tied third to reignite his major form after a slump of late.
Photos: In pictures: The 2019 PGA Championship so far
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Patrick Smith/Getty Images
Johnson faltered coming home and has now finished runner-up in all four of golf's major tournaments.
Photos: In pictures: The 2019 PGA Championship so far
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Julio Cortez/AP
Brooks Koepka drives off the 12th tee during the third round.
Photos: In pictures: The 2019 PGA Championship so far
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Seth Wenig/AP
Jordan Spieth hits out of a bunker onto the fifth green during the third round of the PGA Championship golf tournament on Saturday, May 18.
Photos: In pictures: The 2019 PGA Championship so far
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Julio Cortez/AP
A spectator rests in the shade of a tree along the seventh fairway during the third round.
Photos: In pictures: The 2019 PGA Championship so far
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Andres Kudacki/AP
Phil Mickelson walks up to the 18th green during the third round.
Photos: In pictures: The 2019 PGA Championship so far
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Seth Wenig/AP
Dustin Johnson greets spectators as he walks to the 12th tee.
Photos: In pictures: The 2019 PGA Championship so far
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Julio Cortez/AP
Brooks Koepka picks his ball out of the hole after putting on the eighth green.
Photos: In pictures: The 2019 PGA Championship so far
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Stuart Franklin/Getty Images
Brooks Koepka plays his shot from the 17th tee during the second round of the 2019 PGA Championship on Friday, May 17, in Farmingdale, New York. Koepka, in the lead after the second round, set a record for the lowest 36-hole score in major championship history.
Photos: In pictures: The 2019 PGA Championship so far
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Stuart Franklin/Getty Images
Tiger Woods tees off on the 18th hole. Woods failed to make the cut for the final two rounds after shooting a three-over 73, ending the tournament at five over.
Photos: In pictures: The 2019 PGA Championship so far
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Fans cheer for Tiger Woods on the 13th hole.
Photos: In pictures: The 2019 PGA Championship so far
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Jordan Spieth of the United States lines up a putt on the 16th green during the second round of the US PGA Championship. At the end of the round, Spieth was tied second with Australian Adam Scott.
Photos: In pictures: The 2019 PGA Championship so far
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Mike Ehrmann/Getty Images
Fans line up near the the eighth green during the second round.
Photos: In pictures: The 2019 PGA Championship so far
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Julio Cortez/AP
World No.1 Dustin Johnson reacts after putting on the seventh green.
Photos: In pictures: The 2019 PGA Championship so far
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Stuart Franklin/Getty Images
Phil Mickelson plays a shot from the rough on the third hole.
Photos: In pictures: The 2019 PGA Championship so far
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Charles Krupa/AP
Brooks Koepka, left, shakes hands with Tiger Woods after finishing the second round.
Photos: In pictures: The 2019 PGA Championship so far
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Tommy Fleetwood plays a shot from the fourth tee.
Photos: In pictures: The 2019 PGA Championship so far
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Patrick Smith/Getty Images
Brooks Koepka with yet another impeccable drive on the 15th tee in a thrilling opening round of 63 -- a course record.
Photos: In pictures: The 2019 PGA Championship so far
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Christian Petersen/PGA of America/Getty Images
April's Masters victory felt a long time ago for Tiger Woods; the 15-time major winner regularly located both rough and bunker in a first round that lacked the control of last month.
Photos: In pictures: The 2019 PGA Championship so far
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Alex Noren takes stock on the third hole of this thrillingly difficult golf course. If you miss the fairway and the bunkers, the long grass will eat you alive.
Photos: In pictures: The 20