Lawrence Okolie stopped Wadi Camacho to add the Commonwealth cruiserweight title to his British belt on Saturday night at the Copper Box Arena.
Okolie settled a physical encounter after adapting to Camacho's southpaw style to secure a fourth-round TKO victory and extend his professional record to 12 straight wins.
After the pair battled for the centre of the ring in the opener, Okolie landed a stiff right and followed up with a looping left hook to send Camacho to the ropes.
Okolie responded to a ticking off from his trainer by landing a straight right in the second and hurt Camacho with another right before the bell.
Camacho enjoyed success in the third round by landing a decent left and the pair traded blows before Okolie was warned for punching behind the head.
Okolie connected with a huge right in the fourth round, forcing Camacho to take a knee and followed up with another right to prompt the referee's intervention.