Arsenal secured their first Premier League win in over a month as they best Watford 3-0 at the Emirates Stadium.
At the beginning of the second half Watford came in confident to restore priority but flickers from the January signings Henrikh Mkhitaryan and Pierre-Emerick Aubameyang in the 59th and 77th mintute respectively seal the victory for Arsene Wenger after Petr Cech had saved a penalty from Troy Deeney.
While Arsenal went into the game without a Premier League win since February 3, Javi Gracia's Watford had been enjoying a decent run.
Without a league title since 2004, Wenger is clinging to the hope that reaching the Champions League by winning this season's Europa League will spare him the axe.
He has therefore been forced to sit out of both legs against Swedish side Ostersund as well as the trip to face boyhood club AC Milan last week, a game the Gunners won 2-0.
Aubameyang was one of the established stars who started for Arsenal and the Gabon striker should have opened the scoring when he raced onto Mesut Ozil's pass and shot straight at Watford goalkeeper Orestis Karnezis.
The win over Watford was played in front of thousands of empty seats as fans made a decision to stay away amid the growing discontent.
Deeney's penalty miss moments after Arsenal's second goal was greeted with inevitable ridicule from the stands.
In the wake of Watford's win over Arsenal in October's reverse fixture, Deeney suggested that the Gunners lacked a "bit of cojones, a bit of nuts", but it was the Hornets striker who had a hard afternoon this time around as he missed a second-half penalty in a comprehensive defeat.
When Ozil swung a deep free kick towards the far post, Mustafi punished slack marking by Jose Holebas and Adrian Mariappa as the German defender powered a close-range header past Karnezis.
Watford weren't cowed, however, and kept probing the Gunners backline, with Abdoulaye Doucoure forcing a fine stop from Cech not soon after.
But Watford couldn't take advantage and Granit Xhaka's 20-yard blast after the interval nearly deceived Karnezis before he grabbed the ball just before it crossed the line.
There was more cause for Wenger to wear a rare smile a few minutes later.
Mkhitaryan laid on Aubameyang's strike against the Hornets before the roles were reversed for the third goal.