The 32-year-old, currently recovering from an Achilles tendon injury, considered his future at the club after Arsene Wenger’s reign came to an end, Courbis told France Football.
“He started thinking about a possible departure from Arsenal at the same time as Arsene Wenger,” said Courbis.
" It was the right moment, the final moment to leave with the arrival of the new manager. "
“I had already anticipated this, with two or three offers that were starting to make us think.”
However, had the former FC Lorient man left the Gunners, it would not have been for another Premier League club.
“We were open to different options, China as much as France. He could not see himself playing for another English team other than Arsenal.
“Since the approach from Marseille last season, the notion of returning to Ligue 1 entered his thinking. It was a genuine possibility.”
Koscielny has resumed training following the Achilles injury he suffered against Atletico Madrid last season but is not expected to be available for selection until November.
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