Activision will issue a day one patch for the PlayStation 4 version of Call of Duty: Ghosts that improves the native resolution of the single-player campaign, Eurogamer can exclusively reveal.

The patch makes the campaign output at a native 1080p resolution. Without it, the campaign outputs at 720p.

Digital Foundry's tests with a retail copy of the PS4 version of Infinity Ward's shooter turned up surprising results: the multiplayer runs natively at 1080p resolution - but the single-player runs natively at 720p. This clearly contradicts messaging from both Infinity Ward, Activision and Sony about the resolution of the game, which on Xbox One runs natively at 720p across all modes.

Eurogamer has since learned that a day one patch will be released to address the problem, which Activision is blaming on a "configuration issue".

"Call of Duty: Ghosts runs natively at 1080p on the PlayStation 4," an Activision spokesperson told Eurogamer this evening.

"There was a configuration issue in the retail version on single-player mode only. This has been addressed with a day one software update. People will be able to download the day one update when PlayStation 4 launches in their territory and play at native 1080p."

Without the day one update, you'll get the COD single-player upscaled, including the menu system and the HUD. Indeed, even the occasional screen-tear generated by the game is upscaled from 720p.

Check out Digital Foundry's comparison of the un-patched Call of Duty: Ghosts versus the PC version below.