Pierre-Emerick Aubameyang’s goal was enough to lift Arsenal back into the top four after a 1-0 victory over Watford at Vicarage Road on Monday.
The Gunners had gone into the fixture needing a way to return to the Premier League top four.
Aubameyang got the only goal of the game in the 10th minute as he closed down Ben Foster whose attempted clearance hit the Gabonese striker and ended in the back of the net.
Things went from bad to worse for Watford following captain Troy Deeney’s sending off after he was caught to have elbowed Arsenal midfielder Lucas Torreira.
In the 56th minute, Henrihk Mkhytaryan thought he had doubled Arsenal’s lead only to see his effort from close range saved by Foster.
Watford had a chance of their own but were unlucky not to be on level terms as Adam Masina’s shot from 25 yards hit the cross bar.
The home side went close again with 10 minutes remaining through Andre Gray who rounded Bernd Leno but saw his effort blocked by Ainsley Maitland-Niles.
The win saw Arsenal keep their first away clean sheet in the Premier League this season.
Arsenal move up to fourth on 66 points in the Premier League table while Chelsea and Manchester United are fifth and sixth respectively.
Nigerian international Alex Iwobi was in action for Arsenal for 90 minutes while Isaac Success was introduced early in the second half.