Fulham are looking into claims that John Paintsil was verbally abused by Craig Fagan after Hull City's dramatic 1-0 win at Craven Cottage on Wednesday.
The Ghana international was involved in a verbal spat with the Tigers striker as the final whistle blew, immediately after Manucho had grabbed a last-gasp winner for Phil Brown's side.
Paintsil had to be restrained by team-mates as the two sides lift the pitch and continued to point at Fagan, who responded with shouts of his own.
Cottagers boss Roy Hodgson said of the incident: "The referee told me that John complained to him about being abused by somebody.
"But the referee said he didn't hear anything so he couldn't take any action.
"It's unusual to see John quite that angry. Something obviously happened out there.
"If the matter turns out to be really quite extraordinary and something which we as a football club need to do something about, then we'll consider it."
On the disappointment of losing the game, Hodgson added: "There's no worse way to lose a game than to play well, be staring at a 0-0 draw where you think you should have scored goals and be leading, and then in the 92nd minute to lose it.
"You can't write a worse scenario for a football player or a football coach than that. This is the ultimate football nightmare that you have to live through."