Barcelona and Arsenal are in advanced talks over the possible sale of Per Mertesacker.
The German centre back, who believed to be integral to Arsene Wenger's plans, whipped up a social media storm last night when he started following Barcelona on Instagram.
One source at the Emirates has said that the club hierarchy are furious with Mertesacker and his 'complete disregard for the club.'
'The deal hasn't been made official yet, so it's a bit disrespectful for Mertesacker to be drawing so much attention to the deal.'
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