Usyk is listed on the club's website as an attacker, with his description reading: 'The world boxing champion is a long-time friend of the club and has already played for the team in the Winter Cup friendly tournament.
The Ukrainian, who remains undefeated and has claimed undisputed crowns at both heavyweight and cruiserweight, has identified the winner of the Daniel Dubois vs Joseph Parker clash as his next opponent.
Usyk beat Tyson Fury last May to claim all four heavyweight titles before vacating the IBF belt, which is now held by Dubois, who he defeated somewhat controversially via knockout in 2023.
Heavyweight champion Usyk pictured with Polissya during their 2022 winter training camp.
Usyk is coming off a convincing unanimous decision victory over Tyson Fury in December.
