Wladimir Klitschko, rated #13 by Boxingtalk in the heavyweight division, stopped previously unbeaten Eliseo Castillo in the fourth round. A single punch did all the damage, as Klitschko dropped Castillo with a powerful right hand straight through Castillo's defense.  Although Castillo, rated #33 by Boxingtalk, beat the count, referee Daniel Van De Viele stopped the fight to avoid further damage to Castillo.  It was a solid, confidence building win for Klitschko, albeit against a fringe contender.  How about Klitshko vs. Calvin Brock next? source: Associated Press