LONDON, ENGLAND - MARCH 07: Laurent Koscielny of Arsenal (C) reacts as he is shown a red card by referee Anastasios Sidiropoulos and is sent off during the UEFA Champions League Round of 16 second leg match between Arsenal FC and FC Bayern Muenchen at Emirates Stadium on March 7, 2017 in London, United Kingdom. (Photo by Shaun Botterill/Getty Images)

LONDON, ENGLAND - MARCH 07:  Laurent Koscielny of Arsenal (C) reacts as he is shown a red card by referee Anastasios Sidiropoulos and is sent off during the UEFA Champions League Round of 16 second leg match between Arsenal FC and FC Bayern Muenchen at Emirates Stadium on March 7, 2017 in London, United Kingdom.  (Photo by Shaun Botterill/Getty Images)