Chisora pounds out points win
Dereck Chisora remained on course for a rematch with heavyweight rival Tyson Fury after a dominant points win over Kevin Johnson.
Chisora floored Johnson heavily in the fifth round and looked to be on the verge of stopping the American for the first time, but he survived the storm and forced the Londoner to dig deep in the latter rounds.
Early jabs from Johnson were shrugged off by a fired-up Chisora in the first round and he soon landed his trademark right hook.
Johnson had earned a reputation as an obstinate opponent, but Chisora put it to the test, ramming home more right hands in the second as he continued his savage early assault.
Even the tough Atlanta man was feeling the effects of Chisora's clubbing punches and his tight defences nearly unravelled in the fourth as he soaked up punishment on the ropes.
Chisora sensed Johnson was wavering and made a breakthrough in the fifth, flooring his foe with a big right hand.
Johnson clambered to his feet and groggily held Chisora at bay as the British fighter followed up with more vicious punches.
Chisora's chances of a stoppage slipped away as Johnson went into a defensive shell and offered little in reply when 'Del Boy' pounded away at his head and body.
With the fight slipping away, Johnson finally staged a late stand, unloading some crisp combinations on the tiring Chisora.
But his rally had come too late and Chisora dug deep in the closing rounds, landing more hurtful hooks to wrap up a unanimous points win.
Chisora's efforts were acknowledged by the judges who gave him the win with scores of 118-109, 118-110 and 118-109.
He can now look ahead to a summer showdown with Fury, who defeated him on points back in 2011.
"Yeah I give credit to Johnson he came to survive," said Chisora.
"I said this was going to be long night, it was going to be 12 rounds.
"In the summer me and Tyson will get it on."