NEWARK: Poland's Tomasz Adamek retained his world title with an eighth-round knockout over previously undefeated Johnathon Banks on Friday.

Adamek not only posted his 37th win to go with one loss but he also retained his International Boxing Federation cruiserweight belt.

Adamek seized control of the fight in the sixth round before flooring Banks twice in the eighth. The referee stopped the bout at one minute, 30 seconds of the final round. It was the first defence of the title for Adamek. Adamek took the title here 11 weeks ago with a split-decision victory over Steve Cunningham, knocking the American to the canvas three times to claim his fifth victory in a row, improving his record to 36-1 with 24 knockouts. Adamek won the World Boxing Council light-heavyweight title in 2005 from Australian Paul Briggs and defended the crown twice before suffering his only career defeat, a 2007 unanimous decision loss to American Chad Dawson.