By Johnny WalkerWell, so much for Dereck “Del Boy” Chisora staying out of trouble. One supposes that the British Boxing Board of Control will be having a look at the latest reports out of Ibiza, a popular holiday destination in Spain, where Chisora and world heavyweight champion Wladimir Klitschko happen to be both vacationing at the same time. On Sunday night, Chisora posted ominously on his Facebook page , “Cippriani Ibiza twice now I’ve bumped into Wladimir Klitschko he is annoying me now ! (Picture: Facebook)That ominous Facebook message from Chisora turned into something more than words yesterday when the two men became involved in some kind of altercation at an Ibiza nightclub. Wladimir Klitschko takes on undefeated Russian Alexander Povetkin on Oct. 5.