Mo Farah has been accused of swearing at Andy Vernon following his win in the 5000m in Lausanne.
The 32-year-old made his first appearance on the track since doping allegations were made against his coach Alberto Salazar, but he triumphed in the Diamond League race with a time of 13:11.77.
However, Vernon has claimed that when he went to congratulate his British teammate on his win, Farah verbally abused him and spurned his offer of a handshake.
Vernon told reporters: "I went to shake his hand and he turned his back on me and told me to fuck off. I wanted to bury the hatchet, I'm going up to Font Romeu [where both men train] in a few days' time and I just wanted to end it.
"To not even be a sportsman there and shake my hand I think is pretty disgraceful, to be honest. Like in the armed forces, you salute the rank, not the person sometimes. I wanted to congratulate the performance. Whether we're friends or not, I can appreciate a good performance but I get that reaction.
"With all the bad publicity he's getting at the moment I would have thought he would try to actually make a good name for himself again but by doing that it's not too good for him."
The duo were involved in a spat on Twitter earlier this year.
