Wlad went 12 rounds with Peter and he PACED himself vs Peter and Byrd...he had them on the edge kept them in danger but didn't shoot his load when they were in defensive mode.

The holding is more because of the Sanders fight than anything else...he doesn't hold because he's tired he holds because he 1) doesn't want the other guy to be in the right position to punch 2) he wants to tire the other guy out...it's the exact same thing Lewis did.

Wlad has been past 8 rounds 8 times and only lost once...I think his stamina is fine when he doesn't throw too many punches which is a legitimate problem for ANY heavyweight out there