Apple, Epic Games CEOs on list of witnesses in Fortnite case

Apple CEO Tim Cook testifies remotely via videoconference during a U.S. House Judiciary Subcommittee on Antitrust, Commercial and Administrative Law hearing on "Online Platforms and Market Power" in this screengrab made from video as the committee meets on Capitol Hill, in Washington, U.S., July 29, 2020. U.S. House Judiciary Committee via REUTERS

(Reuters) - Apple Inc and Epic Games have listed their chief executive officers as potential witnesses in a case between the iPhone maker and the video game developer over the App Store payment system, court documents showed.

Apple and Epic Games, creator of the popular game Fortnite, have been in a legal battle since last year, when Epic Games tried to avoid a 30% App Store fee by launching its own in-app payment system. The move prompted Apple to ban Fortnite from its store.