Arsenal hero Martin Keown feels Sokratis was poorly treated by the Gunners ahead of his January move to Olympiacos.
Sokratis featured in defeat to his old club last night.
Speaking before kickoff, Keown said: "I thought he was treated a little unfairly.
"I thought he was a better player than Mustafi. He had a good calibre and we wish him well - but not too well tonight."
The Gunners have taken control of the Europa League round 16 tie with a 3-1 first-leg win last night.
