The Old Trafford giants, on an eight-match unbeaten run in all competitions, head to Pride Park on Thursday for a fifth-round tie that will pit them against their all-time top-scorer.
Pogba’s long-time representative has been at loggerheads with the United hierarchy in recent years and angered the Red Devils once more this week by casting fresh doubt on where Pogba will be next season.
Ighalo will only meet the rest of United’s squad for the first time on Sunday because the Nigerian striker has trained alone in ‘quarantine’ in Manchester following his move from China as a precaution in case he was carrying the coronavirus.
United struggled in the absence of injured midfielders Paul Pogba and Scott McTominay. However, Solskjaer refuses to discuss the idea of any stop-gap signings.