Hansi Flick welcomes surprise guest! Former Arsenal defender spotted at Barcelona training to study German tactical master

Barcelona training saw a familiar face from the Premier League this week as former Arsenal and Valencia defender Shkodran Mustafi arrived at the Ciutat Esportiva Joan Gamper. The retired centre-back was present to get an up-close look at the high-flying Blaugrana under the guidance of Hansi Flick.

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