Harvey Barnes faces three months out of action with a foot injury, but the Newcastle winger does not require surgery.
The 25-year-old limped off after 12 minutes of Sunday's 8-0 thrashing of Sheffield United.
A scan showed Barnes has not suffered a fracture and manager Eddie Howe said his foot is now in a boot.
"It is an injury underneath his toe and he's now started his recovery," said the Newcastle manager.
Barnes joined from Leicester in July for £38m and has made two starts in the Premier League for the Magpies and scored one goal.