Dereck Chisora & Vladimir Klitschko
Chisora & Klitschko paths crossed again in an Ibiza nightclub. (Reuters)

Boxing rivals Dereck Chisora and Wladimir Klitschko have squared up again - this time in an Ibiza nighclub.

Bouncers were forced to intervene as the two heavyweights eyeballed each other, according to the Daily Mirror. However it is not clear whether any blows were exchanged.

Relations have been tense since British fighter Chisora spat water into Klitschko's face last year, prior to a fight with the Ukrainian's older brother Vitali.

"I saw Wladimir, we had a little conversation in a club, it wasn't a great conversation," Chisora told ATG Radio.

"I walked in and he was sitting down and then got up. It was only when I got to my table and looked up he was behind me. So I got up and shook his hand and then we swapped words. I told him, 'I'm coming for you.'"

"They have history," Chisora's trainer Don Charles said. "But it was purely a coincidence that they bumped into each other during their holidays."

Chisora's commendable performance against Vitali Klitschko last February was marred by a week of shameful behaviour outside the ring. In addition to the spitting incident, the 29-year-old also slapped Vitali at their weigh-in prior to the fight and brawled with fellow Brit David Haye at the post-fight press conference.

But Chisora has got himself back on the world title trail after his impressive sixth-round knockout victory over Malik Scott at Wembley Arena earlier this month, with his focus now firmly back on a world title shot.

Wladimir Klitschko is due to defend his WBA, WBO, IBO and IBF world titles against Alexander Povetkin in Moscow on 5 October, while Chisora will resume his quest for another opportunity to challenge one of the Klitschkos against an unnamed opponent at the Copper Box Arena in Hackney on 21 September.