'Don't understand': World No.1 fumes in ugly British Open drama

Brooks Koepka vented his frustration at the speed of fellow players after being visibly annoyed by playing partner JB Holmes in the final round of The Open.

Holmes toiled his way to a dismal 87 in difficult conditions at Royal Portrush on Sunday, finishing the tournament six over having been in contention all weekend.

INCREDIBLE: Shane Lowry makes golf history to win British Open

The 37-year-old is known as one of the more leisurely players on the PGA Tour and Koepka, who adopts a no-nonsense attitude, appeared unhappy with Holmes' approach – even pretending to point to a watch when walking off the 12th green.

"I wasn't wearing a watch, I mean he had a rough day but J.B. is a slow player. I know it's difficult with the wind, but I didn't think he was that bad today. I thought he was all right," he said.

"There were times where I thought it was slow. There's a lot of slow guys out here. It's not the first time I've done it, especially when you've got a walking official with you.

"We were on pace for 13 holes. But I mean, if I'm in a group, we're going to be on pace no matter what. I'm usually ready to go, as soon as the guy's ball is coming down.

"I'm ready to go most of the time. That's what I don't understand when it's your turn to hit, your glove is not on, then you start thinking about it, that's where the problem lies.

"It's not that he takes that long. He doesn't do anything until his turn. That's the frustrating part. But he's not the only one that does it out here."

Koepka became just the fifth player after Jack Nicklaus, Tiger Woods, Rickie Fowler and Jordan Spieth to finish inside the top five of every major in a calendar year.

But Koepka, who was tied fourth at Portrush, was disappointed not to finish higher up the leaderboard.

"I don't see much positive out of it. If you don't play good you're not going to win," he added.

"So, it's very simple. It's disappointing. I didn't play the way I wanted to. And I've got to live with that."

Shane Lowry makes history

A year after missing the halfway cut for the fourth straight time and then losing his US PGA Tour card, Irishman Shane Lowry can barely believe he's the new British Open champion.

Lowry fought back tears and paid a heartfelt tribute to his family after turning The Open into a Sunday procession and sending fans into a frenzy with an emotion-charged six-stroke victory at Royal Portrush.

"I didn't even know going out this morning if I was good enough to win a major," Lowry said after closing with a one-over-par 72 in miserable conditions to finish at 15 under for the championship, comfortably clear of English runner-up Tommy Fleetwood (74).

"I knew I was able to put a few days together. I knew I was able to play the golf course. I just went out there and tried to give my best and, look, I'm here now, a major champion.”

In the first Open staged in Northern Ireland since 1951, Lowry joins Padraig Harrington (2007 and 2008) as only the second man from south of the border to claim the Claret Jug, or win any of golf's four majors.

He also follows in the famous footsteps of fellow Irishmen Fred Daly (1947), Darren Clarke (2011) and Rory McIlroy (2012 and 2014), all from the north, to win The Open.

with agencies