PHOTOS: Arsenal reveal Ospina and Chambers squad numbers

Arsenal have allocated and announced squad numbers for their third and fourth signings of the summer.

Arsenal have announced squad numbers for their two newest signings, Calum Chambers and David Ospina.

The signings have both been formalised within the past 24 hours, following Mathieu Debuchy and Alexis Sanchez into the club this summer.

Goalkeeper David Ospina takes the number 13 shirt, last worn by Wojciech Szczesny in 2011/12. It was previously worn by Aleksandr Hleb.

Chambers will wear the number 21 shirt, which has recently been vacated by Lukasz Fabianski, who had been allocated it since the 2007/08 season.

Previous players to wear the number 21 include Luis Boa Morte, Jermaine Pennant, Eddie McGoldrick and Steve Morrow.

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