Arsene Wenger will not be happy but after conceding an equaliser, the Gunners collapsed and it allowed the home side to snatch all three points. Thanks for following and remember to check the homepage for all the post-match fallout.
I'll leave you Hornets supporters with a nice look at the league table.
For the first 35 minutes it was an even affair with defences on top but as Watford's level dropped, Arsenal's class took over and it leaves Marco Silva with a tricky but much needed half-time team talk.
The first two are in personnel as Adrian Mariappa and Andre Gray depart with Andre Carrillo and Troy Denney coming on - the latter indicating to the defence to switch to a back four.
58min: Penalty shout for Arsenal as Danny Welbeck goes down inside the box under pressure from Jose Holebas, but the referee isn't interested and replays back him up as the Arsenal striker is clearly just out muscled.
52min: But that was a lot better from the Brazilian!
Jose Holebas's run off the ball down the left takes away Hector Bellerin, and that enables Richarlison to cut onto his right foot and fire just wide across goal.
The forward cuts into the box, but Koscielney crucially keeps him under pressure before Bellerin makes a crucial tackle to prevent a shot. Danny Welbeck looks like cashing in on a mix-up among the Watford back three on the edge of the box but Jose Holebas cuts across to hoof the ball out of play for a throw in.