Mikel Arteta is pleased with Arsenal's performance against Sunderland, but is "very worried and very sad" about the penalty awarded to their opponents during the match at the Stadium of Light.
Arteta 'very worried & very sad' over penalty incident
Mikel Arteta is pleased with Arsenal's performance against Sunderland, but is "very worried and very sad" about the penalty awarded to their opponents during the match at the Stadium of Light.
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