Deontay Wilder celebrated his return to the ring with a stunning signature stoppage of Robert Helenius.
Wilder was fighting for the first time since his second successive - and concussive - defeat by Tyson Fury more than 12 months ago as he began a comeback which he hopes will end with him crowned as heavyweight world champion again.
And he made light work of former sparring partner Helenius, landing a short right hand - just Wilder's third of the fight - while backed up in the corner, leaving the Finn prone on the canvas and in need of medical attention.
