I don't think Holyfield has the power to bang him out with one shot or combo so for me it'd depend on how often he could get through the octopus arms defense. A few fighters have got inside on wlad and had a bit of success in there but they haven't been able to do it regularly enough to put a dent in him. Holyfield would be the best infighter Wlad's faced though, so I'f avour him to wear him down and pound out a stoppage late on.