Spectator 'punched' as Patrick Reed embroiled in fresh Presidents Cup scandal

Patrick Reed's caddie is making no apologies for getting into a fist fight with a fan at the Presidents Cup.

The controversial US player's caddie, Kessler Karain - also Reed's brother-in-law - came to blows with a fan after Saturday's morning session at Royal Melbourne.

Security had to step in as tensions boiled over after the morning fourball competition, with Karain admitting he "shoved" the fan but said it only resulted in spilled beer.

Karain made a statement via "Fore Play", a US-based golf podcast, which they issued on Twitter.

Karain, Reed's caddie for six years, said it was his job to "protect your player" and he felt the fan had gone too far with his comments about the 2018 Masters champion.

"We have been known for having fun with some good banter, but after hearing several fans in Australia for 3 days some had taken it too far. I had had enough. And this gentlemen was one of them," the statement said.

"Riding on the cart, guy was about 3 feet from Patrick and said "you f***ing suck".

"I got off the cart and shoved him, said a couple of things, probably a few expletives. Security came and I got back in the cart and left.

"I don't think there's one caddie I know that could blame me.

"Unless his bones break like Mr Glass, the most harm done was a little spilled beer which I'm more than happy to reimburse him for."

Reed win crucial for US at Presidents Cup

Reed had the last laugh at the Presidents Cup with the controversial golf star's singles win crucial to the US team's historic victory.

Reed ended a week from hell at Royal Melbourne with an emphatic four and two victory over the Internationals' CT Pan, which was his first win from four matches, and gave his team the lead for the first time in the tournament.

He said the best way to quieten the fans was to make birdies.

"You make birdies, you don't hear much," Reed said.

"If you come out storming the crowd's pretty quiet and I was able to do that today, kind of get going, and really silence the crowd a little bit."

Reed had five birdies from the first seven holes to race to a six up lead, before the Taiwan world No.76 finally got on the scoreboard.

The American said he treated Sunday's singles as a fresh start after losing three matches with partner Webb Simpson.

He wanted to "get some red" on the scoreboard, meaning a point for the Americans.

"For Webber and I to go out and to win our points today meant a lot for us," he said.

"I knew we were playing well but we weren't quite getting it done and to be able to close them both out today was great."

Reed said the week had been a "tough" experience but he tried to shut out the haters and focus on his golf.

"The biggest thing is just to continue grinding and not let the crowds or other people get in the way of what you're trying to do, and that's play golf," he said.