Gebrselassie also claimed that hotel staff reported “disgraceful conduct” by Farah and his entourage and that he was reported to the police for “attacking a married athlete in the gym”.
He said a criminal charge was dropped because of his own mediation role.
On Thursday, Gebrselassie told The Guardian that Farah had confronted the man.
“Farah said to him: ‘Why are you following me?’ But the guy said he wasn’t – and that he was just doing his work,” said Gebrselassie.
“Immediately Farah punched them and kicked them by foot. Especially the husband. There were lots of witnesses.”
However, Ethiopian Sisay Tsegaye said that he and his wife were involved in the altercation with Farah but that the Briton did not hit his wife and they had now “found peace”.
“A brawl erupted inside the gym,” said Tsegaye.
Gebrselassie, who won four world titles, also said Farah was given a 50% discount on his hotel rates, but left without paying his service bill of 81,000 Ethiopian Birr (£2,170).
In response to Gebrselassie’s claims on Wednesday, a spokesperson for Farah said: “Mo is disappointed with this statement and the continued reluctance by the hotel and its owner to take responsibility for this robbery.
“Mo disputes all of these claims, which are an effort to distract from the situation, where members of his hotel staff used a room key and stole money and items from Mo Farah’s room (there was no safe as it was faulty, and Mo requested a new one).
“Police reports confirm the incident and the hotel admitted responsibility and were in contact with Mo’s legal advisor.
“The hotel even offered to pay Mo the amount stolen, only to withdraw the offer when he prematurely left the hotel and moved to other accommodation due to security concerns.
“Despite many attempts to discuss this issue privately with Mr Gebrselassie, he did not respond but now that he has, we would welcome him or his legal team getting in touch so that this matter can be resolved.”