Matteo Guendouzi decided to taunt the Watford supporters when being substituted this afternoon.
But it was the Arsenal star who was left red faced come full-time.
Withdrawn with the Gunners leading 2-1 thanks to Pierre-Emerick Aubameyang, Guendouzi responded to the Hornets supporters giving him stick by making the '2-1' sign with his fingers.
Moments later David Luiz conceded a penalty and Watford were level as Roberto Pereyra made no mistake from 12 yards.
Guendouzi has received a lot of praise this season, most notably from Arsenal head coach Unai Emery who revealed the likes of Reiss Nelson and Joe Willock can learn from the midfielder.
"Matteo is a very good example for how we can develop our young players, with new young players or the spirit within the players who are here now," Emery said.
"He started last year, at the beginning, with some doubts about his adaptation after he came from Lorient in the second division in France.
"He was very young, but his ambition and his wish to adapt very quickly, as well as his quality, were very good for us. He started playing and training with us, and after, his progress and development during the season was amazing.
"But also, we were working with him on some details we needed to improve with him - his food, his body, how we can work to make it stronger, his arms, his body, his legs.
"This year, I think he’s taken one step ahead, improving and also giving us one level more in his performances. We want to continue with him, working in each training session and in each match.
"For him and for us it’s a big challenge to take that step ahead. For other young players, his spirit, his progress, his development is a good example, for Willock, for Emile Smith Rowe, for Reiss Nelson. It’s a very good example for everybody."
With that said, his actions didn't sit well with some Arsenal fans.
