WBC heavyweight title holder Tyson Fury had a mock sparring with his little son, who embodied WBA, WBO, IBF and IBO world champion Oleksandr Usyk.
"Come on, Usyk! Come on, Usyk," Fury shouted to his son.
Previously, Fury has repeatedly stated that Usyk is too small for the heavyweight division.
Fury last stepped into the ring against Deontay Wilder last October in Las Vegas, USA. He won that fight by TKO as it was stopped in 11th round. Fury has 31 wins (22 by knockout) and one draw.