Arsenal appears to finally be coming to an end, after the midfielder posted a farewell message on Instagram to Gunners fans.The Frenchman started his Arsenal career well, with many expecting he would go on to become a key player in midfield for years to come.But his career in the Premier League fell apart after Mikel Arteta replaced Unai Emery as Arsenal manager.A series of incidents, coupled with concerns over his attitude, resulted in the 22-year-old being frozen out of training by Arteta, before he was shipped out on loan to Hertha Berlin.Here, Daily Star Sport looks at three highs and three lows from his time at Arsenal…Though he was only 19 when he joined Arsenal and had spent all of his career leading up to that move in France,.
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