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Follow your club now for first access to all our news, views and analysis Watford Follow your club now for first access to all our news, views and analysis Arsenal At to Arsenal Matteo Guendouzi was substituted and raised his fingers to the Watford fans to show the score.
There were 23 minutes to go. Not one or two but 23 minutes and they proved to be 23 minutes plus four minutes of injury time in which Arsenal were pummelled, forced into ever more panicky defending and left holding on for a point they frankly did not deserve.
No-one wanted the ball? Guendouzi has become a poster boy of something Arsenal have previously lacked, a bit of grit, a bit of aggression, and the young midfielder had gesticulated angrily with his team-mates for not pressing with him in the first-half and involved himself in some pushing and shoving with Jose Holebas as he backed Nicolas Pepe to add to that feeling.
The biggest condemnation of all was that Watford simply wanted it more, a lot more, as they racked up 31 attempts at goal — and should have won. Emery will also have provoked the ire of Arsenal fans by suggesting that on-loan midfielder Dani Ceballos was suffering in the heat — the Spaniard is from Seville!
It was a game in which Watford re-found their mojo, rediscovered their own midfield bite and unleashed record signing Ismaila Sarr in a rousing second-half in which Gerard Deulofeu was endlessly creative.
And those goals?
If the definition of madness is to continue to do the same thing time and again when clearly it is not working then Arsenal were guilty as they tried to play goal-kicks short inside their own penalty area.
It ran to Cleverley who smashed the ball past Leno. Football season And the equalising goal?
That came from a rapid counter-attack with Abdoulaye Doucoure picking out substitute Roberto Pereyra who ran at David Luiz who, rashly, brought him down just inside the penalty area when surely he just had to jockey the midfielder?
Pereyra picked himself up and sent Leno the wrong way from the spot with all kinds of mayhem ensuing after that and somehow Watford not going on to claim the victory.
In fact, they pushed Arsenal around and by the end if felt like a very different game from the one in which Pierre-Emerick Aubameyang had scored two goals and Mesut Ozil had announced his return to the team, with his first start of the season, by delivering the killer pass in a fine pass move.
Unfortunately for Watford some of their players appeared to have stopped only for Sead Kolasinac to work his way to the edge of the area and pick out Aubameyang who swivelled smartly and shot low past Ben Foster. Surely that would be it or, at least, Arsenal would be able to resist whatever Watford would offer?
The home side had been unlucky to be behind — Leno had saved well from Cleverley and Holebas had shot wastefully over — but Flores certainly provoked a reaction.
When pressure builds and momentum shifts it is for the best teams and coaches to react but Arsenal appeared overwhelmed. Chance after chance was created by Watford in wave after wave of attack and Arsenal had no answer.
Could Arsenal say the same? They are their own worst enemies. Playing the ball out short from the back left them vulnerable because of a lack of precision. Great end-to-end stuff but so frail. Doucoure in midfield caresses a pass out to Sarr with Arsenal wide open and he sweeps the return pass towards the penalty spot to meet Doucoure's burst.
The midfielder meets it on the sidefoot but steers his shot tamely at Leno who had anticipated it and gone down early.
Problem is he doesn't release it at all and gets boxed in at the edge of the area. Arsenal win it back and move it up to Willock. Watford defend it well, Maitland-Niles misplaces a pass when he sweeps up and Watford flood forward but run out of space and personnel.
They can't stop giving the ball away as Watford press their hesitant defenders.
Cleverley's goalbound shot is headed over by David Luiz for a corner that Leno punches away. Arsenal conceding a penalty for the third successive game.
Arsenal continue to play the ball out from the back, lose possession and invite Watford on to them.