Primordial Soul's Rebirth - Chapter 82: – Hunting Two Hunters.

... claiming the same title in its area, and if both of them were to ever meet then they would fight till one of them dies.

That is what was happening as a Giganotosaurus and a Spinosaurus coincidentally came to the same area to hunt.

The fight would have never started if one of them bowed their head accepting the other to be stronger than them, but both of the beasts didn't want to back down.

Neither the Spinosaurus nor the Giganotosaurus wanted to bow their head which meant ...