Arsenal's French defender Laurent Koscielny (L) and Arsenal's Spanish defender Nacho Monreal head the same ball during the English Premier League football match between Arsenal and Manchester City at the Emirates Stadium in London on December 21, 2015. AFP PHOTO / ADRIAN DENNIS RESTRICTED TO EDITORIAL USE. No use with unauthorized audio, video, data, fixture lists, club/league logos or 'live' services. Online in-match use limited to 75 images, no video emulation. No use in betting, games or single club/league/player publications. / AFP / ADRIAN DENNIS (Photo credit should read ADRIAN DENNIS/AFP/Getty Images)
