Tony Bellew and Oleksandr Usyk set to collide after calling each other out on Twitter
Ukrainian holds all four major titles at cruiserweight after his stunning win over Murat Gassiev in the World Boxing Super Series final

TONY BELLEW is set for a showdown with Oleksandr Usyk after the Ukrainian's stunning win over Murat Gassiev.
The Olympic champ, 31, dominated his Russian opponent in a unanimous decision victory in the World Boxing Super Series final.
He scooped the Muhammad Ali Trophy and all four major cruiserweight belts before calling out the Brit, 35, post-fight.
Bellew responded via Twitter last night, roaring: "Usyk I was BORN READY!! Let’s get this done!"
And after Usyk replied "I’M ALSO READY!" promoted Eddie Hearn seemingly sanctioned the clash when he tweeted the OK emoji.
After his emphatic victory, Usyk insisted he would be prepared to go up a weight to face Bellew at heavyweight - claiming he would bulk up on pasta.
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The 15-0 ace said: "First of all, we need to take a rest after this difficult fight.
"After that, I will sit with my team and we will make a decision.
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"At this time I have heard that Tony Bellew wants to fight the winner of the Muhammad Ali Trophy.
"I hope he will see me talking.... 'hey Tony Bellew, are you ready?'
"If he doesn't want to go down, I will go up for him. I will eat more spaghetti for my dinner!"