But new coach Erik ten Hag and a couple signing could not save the Red Devils from Brighton who humiliated them 2-1 at Old Trafford.
Chelsea chairman Todd Boehly said, “Marc is an elite defender of proven Premier League quality and he further strengthens our squad going into the new season.”
With 57 points in 37 games, Manchester United appear to have missed out in the Champions League qualification struggle this season.
The Thomas Tuchel boys had clinged desperately on Romelu Lukaku’s header on the 28th minutes mark, defending spiritedly against the mid-table Brighton who threatened all match.
Extra time loomed when Ihenacho was picked out at the far post from a corner, and he headed home.
Ighalo is expected to return to Shanghai Shenhua in the Chinese Super League at the end of January.
