The Gunners were knocked out of the competition following a late strike by Youssef El Arabi which gave the Greek giants a 2-1 win and took them to the last 16 with a 2-2 aggregate that they won because of the away goals rule.
Pierre-Emerick Aubameyang missed a glorious chance at the death to save the hosts’ blushes shortly after scoring a stunning equaliser.
Mustafi, though, is still enjoying a new lease of life under Arteta who has taught some very valuable lessons about the game.
The 27-year-old recently said: “Even though I’ve played for many years I’m learning a lot from Mikel.
source: express.co.uk