(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."

'I wasn't afraid'

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.

In @BKoepka, I see a positive, determined young man who knows where he wants to go in his career. He wants to win big tournaments, win majors; prepares well for them; obviously has his way of doing things & it's been successful. No reason why we won't see more of this from Brooks — Jack Nicklaus (@jacknicklaus) May 20, 2019

"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 Brooks Koepka successfully defended his PGA Championship title after a thrilling finish at Bethpage Black. Hide Caption 1 of 36 Photos: In pictures: The 2019 PGA Championship so far The 29-year-old clinched his fourth major in eight events after overcoming a late wobble at Bethpage. Hide Caption 2 of 36 Photos: In pictures: The 2019 PGA Championship so far 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. Hide Caption 3 of 36 Photos: In pictures: The 2019 PGA Championship so far England's Matt Wallace was in the chasing pack well behind the leading two at Bethpage. Hide Caption 4 of 36 Photos: In pictures: The 2019 PGA Championship so far Popular veteran Phil Mickelson is a fan favorite in New York. Hide Caption 5 of 36 Photos: In pictures: The 2019 PGA Championship so far Koepka said the back nine was "very stressful" as he battled his own mistakes and the pressure exerted by Johnson. Hide Caption 6 of 36 Photos: In pictures: The 2019 PGA Championship so far Japan's Hideki Matsuyama of Japan chips onto the 13th green during the final round of the PGA Championship. Hide Caption 7 of 36 Photos: In pictures: The 2019 PGA Championship so far Tyrrell Hatton of England makes a shot out of the rough amidst the gallery on the ninth hole during the final round. Hide Caption 8 of 36 Photos: In pictures: The 2019 PGA Championship so far Three-time champion Jordan Spieth finished tied third to reignite his major form after a slump of late. Hide Caption 9 of 36 Photos: In pictures: The 2019 PGA Championship so far Johnson faltered coming home and has now finished runner-up in all four of golf's major tournaments. Hide Caption 10 of 36 Photos: In pictures: The 2019 PGA Championship so far Brooks Koepka drives off the 12th tee during the third round. Hide Caption 11 of 36 Photos: In pictures: The 2019 PGA Championship so far 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. Hide Caption 12 of 36 Photos: In pictures: The 2019 PGA Championship so far A spectator rests in the shade of a tree along the seventh fairway during the third round. Hide Caption 13 of 36 Photos: In pictures: The 2019 PGA Championship so far Phil Mickelson walks up to the 18th green during the third round. Hide Caption 14 of 36 Photos: In pictures: The 2019 PGA Championship so far Dustin Johnson greets spectators as he walks to the 12th tee. Hide Caption 15 of 36 Photos: In pictures: The 2019 PGA Championship so far Brooks Koepka picks his ball out of the hole after putting on the eighth green. Hide Caption 16 of 36 Photos: In pictures: The 2019 PGA Championship so far 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. Hide Caption 17 of 36 Photos: In pictures: The 2019 PGA Championship so far 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. Hide Caption 18 of 36 Photos: In pictures: The 2019 PGA Championship so far Fans cheer for Tiger Woods on the 13th hole. Hide Caption 19 of 36 Photos: In pictures: The 2019 PGA Championship so far 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. Hide Caption 20 of 36 Photos: In pictures: The 2019 PGA Championship so far Fans line up near the the eighth green during the second round. Hide Caption 21 of 36 Photos: In pictures: The 2019 PGA Championship so far World No.1 Dustin Johnson reacts after putting on the seventh green. Hide Caption 22 of 36 Photos: In pictures: The 2019 PGA Championship so far Phil Mickelson plays a shot from the rough on the third hole. Hide Caption 23 of 36 Photos: In pictures: The 2019 PGA Championship so far Brooks Koepka, left, shakes hands with Tiger Woods after finishing the second round. Hide Caption 24 of 36 Photos: In pictures: The 2019 PGA Championship so far Tommy Fleetwood plays a shot from the fourth tee. Hide Caption 25 of 36 Photos: In pictures: The 2019 PGA Championship so far Brooks Koepka with yet another impeccable drive on the 15th tee in a thrilling opening round of 63 -- a course record. Hide Caption 26 of 36 Photos: In pictures: The 2019 PGA Championship so far 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. Hide Caption 27 of 36 Photos: In pictures: The 2019 PGA Championship so far 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. Hide Caption 28 of 36 Photos: In pictures: The 2019 PGA Championship so far John Daly, the PGA Championship winner in 1991, was making a bit of history at Bethpage Black. He has been given permission to use a golf cart at the tournament as a result of his osteoarthritis in his right knee. Hide Caption 29 of 36 Photos: In pictures: The 2019 PGA Championship so far Phil Mickelson and Jason Day salute their fans as they complete solid first rounds of 1 under par. Hide Caption 30 of 36 Photos: In pictures: The 2019 PGA Championship so far Flowing locks blowing in the wind, Tommy Fleetwood in action en route to a very respectable first-round effort of 3 under par. Hide Caption 31 of 36 Photos: In pictures: The 2019 PGA Championship so far Brooks Koepka putts on a hulking eighth green, watched by fans who were witnessing a clinic from the three-time major winner. Hide Caption 32 of 36 Photos: In pictures: The 2019 PGA Championship so far Jason Day's only major victory came in the 2015 PGA Championship. Here he is, one of many to find one of Bethpage Black's daunting sandpits. Hide Caption 33 of 36 Photos: In pictures: The 2019 PGA Championship so far Dustin Johnson, the world No.1 and a favorite among many experts, tees off at the 17th. Hide Caption 34 of 36 Photos: In pictures: The 2019 PGA Championship so far As Phil Mickelson watches his tee shot fly into the distance, his fans make sure to leave with their own memories. Hide Caption 35 of 36 Photos: In pictures: The 2019 PGA Championship so far An image to highlight the extent of this monster golf course. Narrow fairways, damp, long roughs, gaping bunkers, overhanging trees. But then, Brooks Koepka on the tee, helping himself to the most supreme first round of major golf imaginable. Hide Caption 36 of 36

The new Tiger?

Following his impressive display, Koepka's name is now being mentioned in the same breath as greats such as Jack Nicklaus and Tiger Woods.

It's a comparison that Koepka can scarcely believe, having watched his heroes dominate the sport while he was busy working his way through the ranks.

He now looks a fitting heir to Woods' long-term throne having beaten the Masters champion by 17 shots after two rounds.

However, any chance of Koepka beating Woods' record of 10 major trophies before the age of 30 has long past.

"If somebody had said that I'd be mentioned with any of those names, I'd have just laughed at you," said Koepka.

"It's very humbling. You see the appreciation that everybody has for those guys and what they've accomplished in their careers and how great their careers have been.

"To even put my name with theirs is incredible."

Koepka has been compared to fellow American Tiger Woods after his fourth major win.

Getting credit he deserves

Despite setting numerous records, the American's rise has gone somewhat under the radar with his domineering style perhaps not getting the credit it deserves.

Unlike the short bursts of success enjoyed by the likes of Rory McIlroy -- whose four titles came in just over three years -- Koepka's previous three major wins have blended into the background, much like Koepka himself.

Often deadpan in interviews and steely faced out on the course, the American publicly admits to having a chip on his shoulder

A muscle-bound Koepka only took up golf after a car accident ended his dreams of making it in baseball, basketball and other more athletic sports.

However, he is now keen to show the world who he really is.

"I'm still finding me. I'm trying to be who I truly am, I'm not trying to please anybody else anymore," he said.

"I'm not trying to bite my tongue or sit back and just go about my business. I want to be me, I want to be who I truly am and I think you see a lot of who I am on the golf course.

"I viewed the media as an enemy and now I'm viewing it differently. Trying to use it as an outlet has been quite humbling, to say the least."