European captain Luke Donald slammed American supporters for "crossing the line" following a heated second day at the Ryder Cup at Bethpage Black.

The visiting golfers, particularly Rory McIlroy, endured relentless barracking throughout both Saturday sessions.

Persistent remarks were directed at McIlroy as he lined up his shots.

During the morning round, the Northern Irishman was seen yelling at a spectator, whilst his afternoon match faced multiple delays as pleas for quiet - including some from rival Justin Thomas - were issued.

Donald remarked: "It was loud, it was raucous.

"What I consider crossing the line is personal insults and making sounds when they are trying to hit on their backswings or very close to when they are trying to go into their routines. That did happen a little

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