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.

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

Google went to appeals court Monday in an attempt to convince a three-judge panel to overturn a jury’s verdict declaring its app store for Android smartphones as an illegal monopoly and block the penalties imposed by a federal judge to stop the misbehavior.