Calum Chambers' arrival at Arsenal has cast fresh doubt over the future of Thomas Vermaelen. The Daily Mail says Chambers sparked a Twitter storm when he was picture training with his Gunners team-mates in a No 5 shirt on Tuesday.
Chambers - whose £16million signing from Southampton was confirmed on Monday - has joined up with Arsene Wenger's squad at their training camp in Austria.
Although it has been widely reported that Chambers will wear the No 21 shirt in his first season at Arsenal, the picture of him wearing No 5 has raised further questions over the future of Vermaelen.
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