DMITRY BIVOL’S ex-wife has revealed “secrets” around his physical condition ahead of his fight with Artur Beterbiev.

The Russian is bidding to become undisputed light-heavyweight world champion on Saturday night.

He faces fellow unbeaten fighter Beterbiev in Riyadh, Saudi Arabia.

A stacked undercard is also on offer, featuring the rematch between Fabio Wardley and Frazer Clarke.

Chris Eubank Jr. is also appearing in an IBO world middleweight title bout.

However, Bivol will enter the ring for the main event, but only after his ex-wife has backed his opponent.

Following their messy divorce, Ekaterina has revealed details of alleged injuries on social media in a bid to help Beterbiev.

The former couple were married for 10 years after meeting on a flight in 2007 and tying the knot six years later.

They went on to have two children together but announced their separation last year.

However, in a social media attack, Ekaterina has given details of alleged injuries on the eve of the fight.

She wrote “everything I know” as she detailed her ex’s potential weak points going into the bout.

Ekaterina then signed off her post by adding: “But the main thing is that he is a coward! We need your victory, Artur.”

She wrote “everything I know” as she detailed her ex’s potential weak points going into the bout.

Ekaterina then signed off her post by adding: “But the main thing is that he is a coward! We need your victory, Artur.”