US president Donald Trump attended the Ryder Cup to a chorus of cheers from his supporters at Bethpage Black, as the biennial golf mega-event kicked off on Long Island.

Trump flew over the course on Air Force One as the US team got off to a poor start on Friday against defending champions Team Europe, who raced out to a 3-1 lead in the morning foursomes on the first day of the match play competition.

He arrived on the grounds just as the duo of Xander Schauffele and Patrick Cantlay beat Europe's Robert MacIntyre and Viktor Hovland 2UP to avoid a US shutout in the first session of the day.

"I think we'll be ok," Trump told reporters on the tarmac. "All great golfers."

It was hardly the start the Americans had hoped for as they look to recapture the trophy on home soil after losing the 2

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