Alistair Overeem's victory over Fabricio Werdum Saturday at Strikeforce Dallas set up a huge heavyweight battle between Overeem, the current Strikeforce champion, and Antonio "Bigfoot" Silva, one of the hottest heavyweights on the planet. The winner will advance to the Strikeforce heavyweight grand prix final.

With the UFC's parent company have recently purchased Strikeforce, and with neither of these men displaying a lot of shyness when it comes to expressing their aspirations for the Octagon, there's a lot more potentially riding on this fight than a flashy trophy.

No question this will be a great fight between two massive human beings, but I think Bigfoot is in a good position to pull a mild upset in this one. Here are five reasons why.

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