Undefeated Olympic super heavyweight gold medalist Alexander Povetkin (15-0, 11 KOs) became the mandatory challenger for IBF heavyweight champion Wladimir Klitschko with an impressive twelve round unanimous decision over previously unbeaten "Fast" Eddie Chambers (30-1, 16 KOs) in a world title eliminator on Saturday at the Tempodrome in Berlin. Povetkin was much busier early and landed the heavier punches, but when he counterpunched, the technically sound Chambers landed some very clean shots. Povetkin picked up the pace as the bout progressed and outworked Chambers by a wide margin in the middle rounds. Chambers had a good round nine. Entering the championship rounds, you could clearly hear Chambers' co-trainer Buddy McGirt urge his fighter "You've got to get him out of there. You've got to dig down deep." It was Povetkin, however, who closed strong, bringing heavy pressure in rounds eleven and twelve to clinch a 117-111, 119-109, 116-112 win.