Ukraine president Volodymyr Zelensky said he was “outraged” after heavyweight champion Oleksandr Usyk was detained at an airport in Poland.

The incident took place at Krakow Airport as Usyk travelled to London for Saturday’s fight at Wembley between Anthony Joshua and Daniel Dubois.

Usyk’s wife, Yekaterina, was among those to share a clip of her husband being led away in handcuffs.

“I was outraged by this attitude towards our citizen and champion,” Zelensky said. “I’ve instructed the minister of foreign affairs of Ukraine Andrii Sybiha and the minister of internal affairs of Ukraine Ihor Klymenko to immediately find out all the details of the incident at the Krakow airport.

“As soon as I was informed that everything is fine, our champion was released and no one is detaining him anymore.”

Usyk’s wife posted an Instagram story saying: “Everything is ok, everything is fine.

“Oleksandr will explain everything later!!! nothing to be criminal ... Good night to you all.”

His friend and coach Sergey Lapin wrote on the same platform: “Don’t worry, everything’s fine. The customs control service is neglecting its duties.”

Promoter Alex Krassyuk also told Telegraph Sport: “There was a misunderstanding. Usyk was not arrested and he’s free. The issue is resolved already.”

Joshua and Dubois battle for the IBF title that Usyk vacated this summer after beating Tyson Fury in May to become undisputed champion of the world.

Usyk still holds the WBC, WBA and WBO belts, which he will defend in a rematch against Fury on December 21.

The Ukrainian vacated his IBF title after agreeing to fight Fury again instead of facing mandatory challenger Dubois.

Usyk would have been stripped of the title had he not given it up, having seen a request to keep it for the Fury rematch denied under strict IBF rules.

The 37-year-old’s victory over Fury made him boxing’s first undisputed heavyweight champion since Britain’s Lennox Lewis in 1999.

Usyk has also twice beaten Joshua, for whom victory over Dubois should pave the way for a third crack at his nemesis or else a long-awaited all-British showdown with Fury.

Saturday night’s fight at Wembley will take place in front of 96,000 people, a record for a boxing match in the UK.