Mikel Arteta’s side went a goal behind early on as Christian Pulisic opened the scoring for Chelsea in the fifth minute.
But a penalty from Pierre-Emerick Aubameyang pulled Arsenal level before the break, and the striker netted his second of the game in the 67th minute to win the game for the Gunners.
And following Arsenal’s victory, Koscielny sent a message of congratulations to the players as he posted a picture on Instagram of the team’s celebrations at Wembley with the caption: ‘Well done boys for the trophy.’
Koscielny forced through his departure at Arsenal last summer and angered Gunners fans by removing the club’s jersey during his transfer announcement video with Bordeaux.
Former Arsenal striker Ian Wright said at the time that Koscielny should be ‘ashamed’ by his actions.
Meanwhile, former Arsenal midfielder Santi Cazorla has also sent a message to the players following their latest FA…