TMNT vs I-Rex

The Ninja Turtles from TMNT(2014).

VS

Indominus-Rex from Jurassic World.

I-Rex is not allowed to use his camo in this fight.

The fight takes place in a Roman Colosseum.

Who wins and why?

Turtles easily

Turtles. With the strength they showed as well as teamwork, skill, and speed. They can take it down. Especially Raph or Leo since they can just stab it in the face/brain with multi-ton level super strength.