Arsene Wenger had no excuses after Arsenal's 3-0 defeat at Everton left them with a tough challenge to secure fourth spot in the Premier League.
The result at Goodison Park on Sunday left the Toffees just one point behind the Gunners in the race for a Champions League spot, and with a game in hand.
The Cameroonian striker has not played since being substituted with a hamstring injury in the 6-0 victory over Arsenal, and faces a late fitness test as the Blues attempt to overturn a 3-1 deficit from the first leg.
Patrice Evra remains confident Manchester United can topple holders Bayern Munich and progress to the Champions League semi-finals.
United travel to the Allianz Arena on Wednesday for a second-leg showdown with the European champions, knowing they must score following their 1-1 draw at Old Trafford.