The pair posed for the camera after their session by flexing their muscles, and fans noticed Fury’s increase in size.
One theorised Fury could be planning a different approach after Usyk was able to overcome his reach disadvantage to take the fight to the Brit.
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The fan said: “Tyson Fury getting ready for a low blow battle… UsykFury2… Fury stops Usyk…”
Another added: “Fury is looking big. He’s going to try steamroll usyk this time, but will that be playing into Usyks hands?”
A third wrote: “He looks huge….”
And another commented: “I want Tyson to do it man he’s coming in heavy not playing no games. All of that he’s going to box talk don’t believe it. Seek & destroy is the aim.”
Fury could be plotting to come in heavier than the whopping 18 stone, seven pounds he weighed in May in order to implement a more physical fight on Usyk.
Tying up, clinching and making the former cruiserweight king carry his weight, as he did in his historic 2015 win over Wladimir Klitschko, could be a viable route to victory against the unified heavyweight king.
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Fury hurt Usyk in the seventh round of their meeting and is confident of exacting his revenge in their second dance.