UFC star Francis Ngannou is finally responding to Tyson Fury -- telling TMZ Sports if Fury is serious about competing in MMA, Francis is "200% down!"
Remember, Fury -- one of the top heavyweight boxers on the planet -- says he's dead serious about trying his luck in the Octagon ... and plans to train with Conor McGregor.
Fury also said he's eyeing Stipe Miocic and Francis Ngannou and possible opponents.
So, we reached out to Francis to see if he was game -- and man, HE'S ALL IN!