Paris Saint-Germain's Swedish midfielder Zlatan Ibrahimovic (L) heads the ball with Chelsea's English defender Gary Cahill during the UEFA Champions League round of 16 football match between Paris Saint-Germain (PSG) and Chelsea at the Parc des Princes stadium in Paris on February 17, 2015. AFP PHOTO / FRANCK FIFE (Photo credit should read FRANCK FIFE/AFP via Getty Images)
