Emery lasted just 18 months at the Emirates.
Jens Lehmann has recalled a time when Arsene Wenger and Sir Alex Ferguson clashed in the tunnel at Old Trafford.
So Liverpool are thinking about bringing Raheem Sterling back? Here are seven returns only Wikipedia can recall.
The pair were embroiled in a training ground bust-up before Lehmann moved elsewhere.
Vito Mannone has lifted the lid on the 'tension inside the training ground' between Lehmann and Almunia...
Lee Grant will be the latest in a series of left-field keepers signed by Man Utd. Liverpool and Arsenal too.
Arsenal "need to retain some continuity", so Steve Bould can stay. Jens Lehmann? Erm...
Unai Emery is not in the business of making friends at Arsenal. He wants his PSG guys.
William Gallas was a 'sulky child' while he was Arsenal captain, according to Mr. Jens Lehmann.
Lehmann received a call in November 2004 asking whether he wanted to leave Arsenal for Liverpool.
Jens Lehmann was sent off for Arsenal in the 2006 UCL final for a foul on Samuel Eto'o.
Jens Lehmann thinks Liverpool boss Jurgen Klopp should keep faith with Loris Karius.
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