Having demanded the club release him from his contract, the 33-year-old updated his social media account to troll his team.
Koscielny's account now has the eyes emoji posted alongside the Arsenal tag and his profile pic showing off the captain's armband, perhaps pointing out how he's stuck at the Emirates.
Gunners boss Unai Emery is expected to strip him of the skipper's role, and fine him two weeks' wages, over the dispute.
Koscielny is taking the absolute p*ss with his Instagram bio, either someone pays for his services, or we let him rot in the reserves. pic.twitter.com/CLRXZAN9Tk— MR DT © (@MrDtAFC) July 12, 2019