Both in their prime as fighters it's very hard to pick a winner from the two. GSP has great kickboxing and wrestling skills and boasts a record of 17-2-0. BJ Penn counter acts that with great BJJ and boxing, his record being 13-4-1. The only chink in BJ Penn's armour is said to be his cardio and with the fight being five rounds will certainly be put to the test.

As Dana White said in an earlier press conference "Maybe in a lifetime you will see two or three amazing fights like this in the UFC"

Also on the card is Lyoto "The dragon" Machida Vs Thiago Silva. The two fighters are 13-0-0 in the UFC and this fight is most definitely one to watch.

Watch it all LIVE in the UK & Ireland on Setanta Sports or check your countries listing for channel and times details.