Former boxing world champion Ricky Hatton has identified what he believes to be the biggest concern for Tyson Fury ahead of his fight with Oleksandr Usyk.
The pair fight live on DAZN PPV on Saturday night, with the winner becoming the first-ever undisputed world champion of the four-belt era.
Both men will be looking to defend their unbeaten record, with Fury narrowly avoiding defeat twice in recent years - first against Deontay Wilder and most recently at the hands of Francis Ngannou.
Speaking to Lord Ping , Hatton said the three Wilder fights could have negatively impacted Fury, and questioned how "much he has left in the tank".
"The only thing that worries me as his friend is we don’t know how much those fights with Wilder have taken out of him," said Hatton.
"When you look at the way Joe Parker dispatched Wilder, you could see the toll the Tyson fights had taken on him.
"Could there be too many miles on the clock? He’s had his bad times – he went up to 23 stone – and he lost all that weight to get back in shape.
"That would be my biggest concern for Tyson, we don’t know how much he has left in the tank."
Live on DAZN PPV: Fury vs. Usyk on May 18. Click here for details .