Ighalo was signed on a six months loan deal from Chinese club, Shanghai Shenhua with an option to buy.
United signed the 30 years old striker minutes before the closure of the January transfer window with many beliving the deal would no longer happen.
Ighalo is expected to fill the void left by striker Marcus Rashford who is currently injured.
Meanwhile, report have it that Aston Villa had opportunity of signing Ighalo 24 hours earlier but rejected the offer.
