Per Mertesacker has been ruled out of our trip to the United States - but new signings Granit Xhaka and Rob Holding are both in the squad.
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Per played against Lens on Friday but has a knee problem so will remain at our London Colney base. With Laurent Koscielny resting after Euro 2016 and Gabriel suffering from tonsillitis, Calum Chambers is our most experienced centre back on tour.
Our 23-man squad includes plenty of younger players, including Jeff Reine-Adelaide, Chris Willock and Gedion Zelalem. Santi Cazorla did not play against Lens but could face MLS All-Stars and Chivas.
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