Google’s power in the digital economy will face another major legal test starting Monday in a case targeting its role as a gatekeeper on billions of mobile devices.

A group of San Francisco jurors will begin hearing arguments from Fortnite-maker Epic Games that Google used its dominant position to squeeze excess profits from app developers. The case forms the second part of Epic’s attack on the two largest mobile software providers after the game developer went up against Apple in a 2021 courtroom battle.