ST ALBANS, ENGLAND - AUGUST 01: (L-R) Gabriel, Per Mertesacker and Laurent Koscielny of Arsenal during a training session at London Colney on August 1, 2015 in St Albans, England. (Photo by Stuart MacFarlane/Arsenal FC via Getty Images)
ST ALBANS, ENGLAND - AUGUST 01: (L-R) Gabriel, Per Mertesacker and Laurent Koscielny of Arsenal during a training session at London Colney on August 1, 2015 in St Albans, England. (Photo by Stuart MacFarlane/Arsenal FC via Getty Images)