"I ain't cleaning that up." | Mike Hewitt/Getty Images
The set of photographs is one of the most iconic in football history, with Marco Materazzi and Rui Costa, rivals on opposite sides of one of the sport’s fiercest derby rivalries, united on the San Siro pitch as flares rained down from the stands during a Milan derby in 2005.
It was 12 April 2005 and AC Milan were facing Inter in the second leg of a Champions League quarter-final tie. Both clubs share the historic stadium but the Rossoneri were the ‘away’ team that night, having already won 2-0 in the first leg a week earlier.