Referred to in court documents as John Doe, the plaintiff alleges he was led to a back room at the SoHo club where people were using drugs and engaging with escorts.
He said he realised the drinks he was given were spiked and “impacting his faculties”.
In his statement, the plaintiff says he came in and out of consciousness and while he was aware of what was happening, he could not stop it.
The statement alleges the “defenceless” plaintiff was raped by Combs in the back room of the nightclub.
In a statement to the BBC in response to separate federal criminal charges, Combs’ lawyer said: “In court, the truth will prevail: that Mr Combs never sexually assaulted or trafficked anyone – man or woman, adult or minor.”