Now, before you read it, keep in mind that this is MY OPINION and that there are may other possible outcomes to this fight. If you're somebody who's easily offended by stuff like this, proceed with immense caution. 

Tarbosaurus vs. Oxalaia

Tarbosaurus bataar

Length: 39 feet (12 meters)
Weight: 7 tons
Era: Late Cretaceous
Location: Asia

These formidable creatures are sometimes seen hunting together with Tyrannosaurus and Daspletosaurus. They are not as intelligent as the Tyrannosaurus on the island and therefore don't form packs as often. They seem to have some sort of rivalry with the Zhuchengtyrannus on the island. They have very short arms, even shorter than those of Tyrannosaurus. Their jaws are about the same length as their larger cousin's, but aren't as deep and thinner than those of Tyrannosaurus. They hunt just like their larger cousin, by ambushing prey. Due to their different skull shape they don't posess true binocular vision, but it is still better than most other dinosaurs on Isla Pelea.

Oxalaia quilombensis

Length: 43 feet (13 meters)
Weight: 7 tons
Era: Late Cretaceous
Location: South America

They can be found around the rivers fishing for large Coelocanths and the Onchopristis which have been cloned so that the large Spinosaurs have more food. They are accepted by the Suchomimus and Spinosaurus on the island. Their large sail is mainly for thermoregulation and attracting mates. They have slender jaws which can't exert a lot of pressure, but can easily grip large, slippery fish and small-medium sized dinosaurs. Their large hand claws are their main weapon, when facing other predators and are a good one at that.

Fight!

A lone Tarbosaurus is lurking at the edge of a forest. He is staring at an Oxalaia. The male is having a lot of trouble during the drought and is very weak. The female Tarbosaurus knows that and she is craving for a meal as well.

Then she crashes out of the tree line and towards the Oxalaia. The male hears her loud footsteps and steps aside. The female swings her head around and smashes a couple of ribs in the male's chest.

The Oxalaia backs away and  roars at the female. He rushes at her and then stops before hitting her. She is utterly confused and then the Oxalaia slashes her face. She screams and roars while the Oxalaia's claws scrape her skull.

They both take a few steps back and stare at each other. Then the Oxalaia charges at her once again, but this time she knows ahat to do and instantly lunges towards his arm. With a quick and powerful bite she rips the Oxalaia's left arm out and proceeds to eat it infront of her furious opponent to mock him.

The male lashes out with his second arm and connects with her neck, fortunately for her, he doesn't penetrate deep enough to kill her. She uses her head as a club again and smacks him in the skull. While the male is confused she charges at him and bites his leg. With a crunch and a turn of her head he falls to the ground. He looks down his body and can see that his calf is just one mangled mess. Then he looks at the female Tarbosaurus again.

She snarls at him and get's ready to charge at the Oxalaia. With every step the earth trembles as she runs at him. He lashes out with his arm again and he connects with her snout. She stumbles away after the incredibe hit to her head, but it doesn't keep her away for too long and she charges at the male once again.

The Oxalaia kicks her chest with the last bit of power he has, but this time he does a lot more damage. The female steps back and looks at her chest. The force of the kick was so enormous that both of her arms were only a single sinew away from falling down and three large gashes ran across her chest.

She is getting ready to charge at him again, but then she flinches because of the pain. The Oxalaia sees his chance and gets back to his feet. He can't put a lot of weight on his left leg, but at least he can stand upright.

The female looks up and sees the Oxalaia as he is trying to limp away from her. She tries to bear with the pain and charges at the Oxalaia one last time. She easily catches up with him and then tackles him. He falls down and has horror in his eyes as the female puts her jaws around his neck and bites down as strong as she can. She looks up from the corpse, takes a deep breath and roars as loud as she can. Then she starts eating.

Winner: Tarbosaurus bataar