Tyson Fury produced a typically erratic display in an entertaining stoppage win over Joey Abell.
Fury had been absent from the ring for almost 10 months after two fights with David Haye fell through and he became embroiled in a wild brawl before his superior firepower broke Abell's resistance in the fourth round.
The former British champion worked behind a stiff jab in the opener, but there were early warning signs as Abell landed two sharp left hands.
Another crisp left breached Fury defences in the second, forcing him to hold, and Abell was warned for use of the head as he waded in with crude punches.
Fury's frustration appeared to get the better of him when he landed a low blow after being told to break in the third, but received only a stern telling off from the referee.
He had shown little quality so far, but gave a glimpse of his talent when a jab followed by a rapid right dropped Abell in the third.
The American climbed groggily to his feet, but was sent down by another big right and the bell spared him more punishment.
Fury appeared a few punches from victory, only to risk disaster in the opening minute of the fourth, as Abell unloaded a big right which wobbled his towering 6'9" tall opponent.
This punch prompted a furious response from Fury, who turned Abell on the ropes and dropped him with a barrage of punches.
Abell again rose from the canvas, but Fury prompted the referee to step in when he floored him a fourth time with another assault.
This win moved Fury closer to a rematch with Dereck Chisora, but he holds his British rival in low regard and called for a fight with world champion Wladimir Klitschko.
"I beat Chisora two years ago when I was only a novice, fourteen fights and out of shape," said Fury.
"Tyson too fast Fury, that's the name, fighting's the game and these are bums compared to me. I want Wladimir Klitschko, he's avoiding me, let's get it on Wlad."