Epic accused Google in a 2020 lawsuit of monopolizing how consumers access apps on Android devices and how they pay for transactions within apps.

Lawyers for Alphabet's Google and "Fortnite" maker Epic Games squared off before a U.S. appeals court in California on Monday, as Google tries to undo a jury verdict and a judge's order forcing it to revamp its app store.

Ellsworth told the appeals court that U.S. District Judge James Donato improperly allowed Epic to turn the Google trial into a “do-over” that excluded the Apple app store as a rival in the market definition that led to the jury’s verdict in its case.