It was tough because Peter walked through his punches and roughed him up, and when this happened, peter got the better of the exchanges. Wlad tried his best not to make it a 'streetfight', and did an incredible amount of holding.
Holding is a part of boxing but Wlad did not won the fight because of holding. He won because of his great footwork and punching power. In the 12the round Wlad goes for the knock out. This fight was a very good and rough fight. Wlad was cut against Brock and after that he knocks Brock out.
Brock and Peter are night and day from Lennox Lewis. If Wlad was under against Lewis he wouldn't be pressing the action, Lewis would be the one pushing him around like a ragdoll.
Watch this: [ame]http://www.youtube.com/watch?v=wuH0UMpN9Pc[/ame] [ame]http://www.youtube.com/watch?v=JoUxBBq2n0g[/ame]