Sagna's current contract with the Gunners is not due to expire at the end of June but, according to The Daily Express, his seemingly imminent switch to the Etihad Stadium could be finalised today after the 31-year-old appeared to bid a heartfelt farewell to Arsenal on Thursday night via the medium of his Instagram account.
While it is has been quite apparent for quite some time now that Saga did not intend to extend his deal in North London given the seemingly more lucrative terms on offer with the reigning Premier League champions, Arsenal fans will nevertheless be disappointed to finally see such a loyal and reliable player depart to a direct rival for no reward.
With Carl Jenkinson left as the only real recognised, specialist right-back in Arsene Wenger's first-team squad, it is obvious that the addition of a solid and adequate replacement for the outgoing Sagna should be the first priority - along with the recruitment of a new striker - for the Frenchman in this summer's transfer market.
Indeed, Arsenal may already have identified their next recruit in the form of Toulouse defender Serge Aurier, but the status of that particular pursuit appears unclear at this point, particularly with him currently in Brazil as part of the Ivory Coast's final 23-man squad for the World Cup.
Sagna's seven years of service to Wenger's side will surely see him remembered fondly at Arsenal, yet I'm sure some supporters probably cannot help but question the motives behind such a move.
Approaching the twilight of his career, there is no doubt that the security of what will probably be a longer contract with competitive wages would have come as a huge appeal to Sagna - not to mention the obvious strength of Manchester City's squad and their ability to compete for major honours on a consistent basis.
However, it's certainly worth noting that Arsenal ended their nine-year trophy drought with victory in the FA Cup last season and should themselves be able to challenge for further success moving forward under Wenger, provided he continues to make serious investments in future windows.
Pablo Zabaleta's current role as Manchester City's undisputed right-back will surely pose a problem for Sagna.
While Manuel Pellegrini may plan to rotate the two depending on the occasion, the Argentine is arguably the best in his position in the Premier League and may not take kindly to having his previously guaranteed position in the team threatened.
Sagna's arrival at Manchester City will almost certainly spell the end for Micah Richards' long stint at the club, you would imagine, with the injury-prone but versatile defender having failed to sufficiently challenge Zabaleta for a starting berth in recent times.