MO Farah has claimed Great Britain teammate Andy Vernon questioned his nationality after the double Olympic champion won European 10,000m gold last summer.
Farah, who beat Vernon to victory at the European Championships in Zurich, alleged his teammate suggested he did not deserve the title as he was not European.
Farah, who was born in Mogadishu, Somalia, before moving to Britain as a child, made the claims when he was questioned about a Twitter spat the pair had last Tuesday.
''It happened in the European championships in Zurich, where he came second in the race I won,'' Farah said.
''We were sitting down together and there were a number of staff and athletes there too. One comment he made, which I didn't really like, was to say he should have won the gold.
''I was like, 'What, the gold should have been given to you?' And I was like, because he was the only European guy?
"You can't say something like that. I was kind of biting my tongue at the time. I don't know what he meant, but at that point it hurt me.
"But I moved on. That was private.''
Vernon apologised if the remarks were taken the wrong way, saying: ''I said it on a table full of people and we were all having a joke at the time.
"We had just raced and the team was all in high spirits. The whole table was having a joke and a laugh and it was just a comment to carry on the jokes.
"He laughed at the time. If he did take it out of context it wasn't meant that way and I apologise.''
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