The fall-out from America's defeat in the Ryder Cup continues, as do reports of tension from the US camp, with Dustin Johnson and Brooks Koepka said to have been at each others throats on Sunday.

The Telegraph reports that America's two top-ranked players, Johnson and Koepka, had to be separated after a flare-up at the post-match festivities.

Witnesses say the duo almost came to blows after a heated exchange following an invite into the European team room.

The reason for the bust-up was not known but the incident came as a surprise as the two are believed to be friends off the golf course.

Johnson and Koepka are gym partners, working out of the same Florida gym and had shared the nickname of the 'the Bash Brothers', owing to their ability to hit the ball long.

Reports of the row between Johnson and Koepka come on the back of Patrick Reed's attack on Jordan Spieth, who he blamed for the end of their successful partnership.

Reed and Spieth had won four and halved two of their seven matches together at Gleneagles and Hazeltine, but Reed was twice paired with Tiger Woods and Spieth played four matches with Justin Thomas in Paris.

"The issue's obviously with Jordan not wanting to play with me," Reed said.

"I don't have any issue with Jordan. When it comes right down to it, I don't care if I like the person I'm paired with or if the person likes me as long as it works and it sets up the team for success."