LONDON, ENGLAND - MARCH 11: Referee Bjorn Kuipers of the Netherlands shows a straight red card to Zlatan Ibrahimovic (not seen) of PSG for his tackle on Oscar of Chelsea during the UEFA Champions League Round of 16, second leg match between Chelsea and Paris Saint-Germain at Stamford Bridge on March 11, 2015 in London, England. (Photo by Mike Hewitt/Getty Images)
