Bryson DeChambeau was branded "classless" after appearing to complain about a European decision not to concede a putt early in his Ryder Cup fourballs match on Saturday.
DeChambeau duly rolled the ball into the hole but did not seem happy that he had been made to do so as he laid his putter on ground after taking his shot.
Even though DeChambeau was using an elongated putter, the gesture was meant to indicate the putt had been "inside the leather", or shorter than the distance from club head to bottom of the grip and could have been conceded.
"Come on Bryson, that's just not good," said revered American coach Butch Harmon, who was on commentary duties for Sky Sports. "It's not right, we don't need it. Just play golf. Classless."
Former European captain Paul McGinley added: "This is out of order in my view. Come on, just get on with it.
"I guess we shouldn't make too much of a deal of it. It was just a bit of petulance."