Tyrannosaurus rex vs Didelphodon vorax

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There was a mammal living in the Late Cretaceous Period that we call Didelphodon vorax.  There were other species of Didelphodon as well.   Didelphodon has a more powerful bite than other mammals of the period.  It also was bigger than all or most of the other mammals.  Size was not necessarily an advantage for mammals that were trying to avoid being a snack for the Theropod (meat eating) dinosaurs.  After the big non-avian dinosaurs went extinct the mammals were free to get a lot bigger...wooly mammoths, Colombian mammaths, Indricotherium, African elephants, short faced bears, polar bears, & etc.  Non-avian dinosaurs refers to the ones that had not evolved into birds.

Anyway, back to Didelphodon.  They weighed up to 11 lbs (5 kg) and appear to have had a skull like a Tasmanian Devil and a body like a weasel or maybe an opossum.  They had a bite that was unusually powerful so it may have eaten, among other things, turtles and/or shellfish...like clams.

The picture is of a Didelphodon vorax that was caught up in a tree by a Tyrannosaurus rex.
Who do you think will win that fight?  Although if Didelphodon vorax does not become a T. rex candy bar, it would be a win for the Didelphodon.

Tyrannosaurus rex vs Didelphodon vorax