Newcastle midfielder Joelinton is facing at least six weeks on the sidelines after suffering a thigh injury in Saturday's FA Cup derby victory over Sunderland.
The Brazil international damaged a tendon in his thigh at the Stadium of Light and will be sidelined for some time.
Head coach Eddie Howe said: 'The prospects over the next couple of weeks aren't good. It's an injury that will see him certainly miss probably a minimum of six weeks.
'It's a real blow for us because he's such an important player. He's had a very stop-start season, unfortunately, this year where he was so consistent last year in his selection.