Mickelson says he was not affected by heckler at LIV Golf Invitational Bedminster

Phil Mickelson says he was not distracted by being heckled before teeing off in the LIV Golf Invitational Bedminster on Friday.

Mickelson stepped back from the tee after a spectator shouted "Do it for the Saudi Royal Family" at Trump National Golf Club Bedminster.

The six-time major champion was one of the highest profile players to sign a hugely lucrative deal with the Saudi-backed breakaway LIV Golf series, leading to him being suspended from the PGA Tour.

Mickelson was way down the leaderboard in a tie for 43rd after shooting a four-over 75 in the opening round of the third LIV Golf event in New Jersey, where debutant Henrik Stenson shares the lead with Patrick Reed on seven under.

The 52-year-old insisted he was not affected by the words of a vocal spectator before he took his first shot.

When asked if he was affected by being heckled, Mickelson said: "No. I had a really good day. The people here have always been great and treated me well.

"I had a really good day with the fans and with Henrik playing well, there was a lot of good things going on. I'm just a little frustrated with my game to be honest.

He added: "I'm just frustrated because I expect more of myself, so I'm gonna work until I get it fixed."

Asked again about the heckler, he replied: "I've always enjoyed playing in this area and we had a great day thereafter, I thought it was a good day all around, so I didn't really think much of it."

Stenson made a great start to his first LIV Golf event and was happy to be playing again after losing the European Ryder Cup captaincy due to his defection.

The Swede said: "It's nice to be out there playing golf, and yeah, of course it’s been a busy couple of weeks and not the most fun, but we keep our head down and focus on the golf."