Manchester United defeated Arsenal 3-1 in the 5th round of the FA Cup to maintain interim Manager Ole Gunnar Solskjaer's winning run.
Goals from former Arsenal forwards, Alexis Sanches and Jesse Lingard, gave the Red Devils a two-goal lead before Aubameyang pulled one back late in the first half.
The Gunners chased an equalizer from the blast of the first whistle in the second half but found it difficult breaking down United's resolute defense.
There was no David de Gea in the lineup or on the bench but United didn't miss their star goalkeeper, with Sergio Romero rising to the occasion when called upon.
The Argentine made two remarkable saves to deny Ramsey from close range and Lacazette's fierce shot.
As the game progressed, Arsenal committed more bodies forward, with Ozil coming for Iwobi as they attempted to level things up.
But that proved costly for Unai Emery's men. United hit them on the counter as Martial finished off after Cech had saved Pogba's low drive.
The win kept Ole Gunnar Solskjaer's hundred percent record as United boss intact. The Norwegian has now won all of the eight games he has managed as the club's caretaker coach since replacing Mourinho in December.