Charlie Sheen has hit back at Brett Rossi's claims after she filed a lawsuit against him.

Charlie Sheen

Charlie Sheen

The 'Anger Management' star's lawyer Martin D. Singer insists the actor will fight his former fiancée's claims after she alleged he caused her "emotional distress and negligence" by not telling her he was HIV positive when they began their intimate relationship in 2013.

Brett, who is also known as Scottine, also claims Sheen - who confirmed last month he is HIV positive in a televised interview - forced her to have an abortion so they wouldn't "give birth to a retarded child".

But Martin told Us Weekly: "Charlie Sheen intends to vigorously defend the lawsuit filed by Scottine Ross.

"We are confident that Mr. Sheen will prevail in this action and will prevail on his claims for affirmative relief against her."

Rossi insists she would never have engaged in sex with him if she'd known he was HIV positive.

Documents filed at Los Angeles Superior Court state: "If Sheen had disclosed to the Plaintiff that he was HIV positive when they met for the very first time, the Plaintiff never would have engaged in sex with him, and the resulting relationship between the two would never have occurred."

Rossi's legal team are also claiming that Charlie's lawyers tried to settle the matter out of court by offering to pay $1 million by December 2.

However, she alleges that following his tell all interview last month, he claimed she had breached their agreement, which she refutes, and decided against signing the settlement documents.

She says Sheen had unprotected sex with her five times before she found out he was HIV positive.