They were camped on the Mati River, of which Karl's lands lay south of. The fighting was apparently small-scale as two months later, Karl had no difficulty capturing Dyrrhachium from the Angevins.
They were stationed on the Mati River, which was located south of Karl's domain. The conflict appears to have been relatively minor as two months later, Karl successfully conquered Dyrrhachium from the Angevins.