Though he mostly cruised for 12 rounds before landing a vicious left hand that knocked Eddie Chambers through the ropes and out in the waning seconds of the bout, Wladimir Klitschko got the best test he's had in years today in Germany.

Klitschko (54-3, 48 KO) was leading 109-100 on the Bad Left Hook card, and probably was up by that score or 110-99 on most cards. Before the 11th and 12th rounds, he was berated by trainer Emanuel Steward for not being aggressive enough. Steward referred to it as "another Ibragimov," meaning that because Wladimir wasn't aggressive, he would have to "settle" for a dominant decision, rather than something for the highlight reels.

Steward was being a bit dramatic, as this was nowhere near the stinker of Klitschko-Ibragimov or Klitschko-Chagaev, but before the 12th, Klitschko snapped back that he would do it. And do it he did. The official time of the stoppage was 2:55 of the 12th round.

Chambers (35-2, 18 KO) had a great gameplan early, but he just wasn't good enough to beat Klitschko. Not big enough, not good enough, not powerful enough, and really, not quite fast enough, despite that being his chief strength. He couldn't outbox Wladimir.

Early in the bout, Chambers attempted to get into Klitschko's head first by picking him up off of his feet, and then in the next round by actually picking him up and slamming him to the mat. But Klitschko rattled only a bit, and quickly got past it. After that, he put on his usual clinic.

Overall, it was a more aggressive performance than usual for the world heavyweight champion. He dealt with Chambers very well, disposing of yet another challenger. Who's next? Who knows? But whoever it is, Wladimir Klitschko reigns clearly as the king of the heavyweights at this point, at least for my money.