The defender has stunned the Gunners by refusing to travel to the USA for the club's pre-season tour.
"We hope to resolve this matter and will not be providing any further comment at this time".More news: Lindelof agent hints at Barcelona interest
Arsenal fans have since been wondering what could have happened behind the scenes for Koscielny to outright refuse to travel.
Koscielny, 33, joined Arsenal in 2010 from Lorient and now has one year left on his contract. Last season Emery dealt with Mesut Ozil being unhappy and the Spanish coach was all about unity and having a collective spirit following Arsene Wenger's departure.
There is perhaps no obvious standout candidate now at the Emirates Stadium to take over from Koscielny - who has not been formally stripped of the captaincy yet - but Bellerin has some support among the fans.More news: Call of Duty: Modern Warfare Gameplay Reveals New Gunfight Mode
This decision from Koscielny will no doubt have a huge impact on the locker room.
Bordeaux's new manager Paulo Sousa was reported to have made Koscielny a "priority" this summer, wanting to use his experience and leadership to guide the club to help the club return to its once prominent role in the league. The Frenchman, who is now captain of the North London club, came to them from Lorient in Ligue 1 as a raw defender lacking in physical attributes, but over the years, turned into one of the most coveted centre-backs in the Premier League. Considering this situation with Koscielny, they may try and keep Saliba for the upcoming season instead. They have also been invited to be this year's opposition in Barcelona's annual Joan Gamper Trophy, to be played at Camp Nou on 4 August.More news: Divock Origi signs new long-term deal at Liverpool