As Matteo Guendouzi left the pitch at Vicarage Road to a chorus of boos from the Watford fans, he reminded them of the score – Arsenal were winning 2-1 at the time, though there was still more than 20 minutes to go.
Then Watford equalised through Roberto Pereyra’s penalty, with the Premier League game finishing 2-2.
And the Hertfordshire club couldn’t resist hitting back at Guendouzi.
Pierre-Emerick Aubameyang scored twice in the first half, but even manager Unai Emery was concerned.
“Physically they are stronger than us so we want to break the lines from the goal-kick and connect to Mesut Ozil, like we did with the first goal,” he said.
“We knew that 2-0 was not enough at half-time. ”