Seats flew between the visitors and Auteuil ultras during the game, while Boulogne hooligans clashed again with O'Side after the final whistle. Matches between Paris Saint-Germain and Galatasaray have been classed as high risk since their 1996–97 UEFA Cup Winners' Cup last 16 match at Parc des Princes in October 1996. Attacked by Boulogne hooligans, the Turkish supporters got the better of them and a handful of PSG fans were seriously injured. The Parisians got their revenge in March 2001 during their 2000–01 UEFA Champions League second group stage match. After being provoked, Auteuil and Boulogne hooligans, at the time on good terms, attacked the Galatasaray followers in the stands. More than fifty Turks had to be hospitalized in the French capital. In December 2019, both teams met in Paris for the 2019–20 UEFA Champions League group stages and violence erupted in the streets, leaving one PSG fan with a head trauma and one Galatasaray supporter with a hand injury. During the match, PSG ultras mocked Galatasaray's elimination with a banner. But it was their attack on Chelsea hooligan firm Chelsea Headhunters that earned PSG hooligans high praise on web sites dedicated to football violence. In September 2004, a 150-strong PSG mob assaulted around 50 Chelsea hooligans before their 2004–05 UEFA Champions League group stage match in Paris, sparking a rivalry that still stands today. Both teams met again in the 2013–14 UEFA Champions League quarter-finals. Before the first-leg match at Parc des Princes in April 2014, about 100 fans from each team, including members of former Boulogne hooligan firms, fought in a tourist area of the French capital. Two fans were injured. Following a humiliating 4–2 loss in the UEFA Cup to Israeli club Hapoel Tel Aviv at Parc des Princes, PSG hooligans took the streets and targeted Jewish fans. A French-Jewish supporter of Hapoel, Yaniv Hazout, was surrounded, threatened and subjected to a barrage of racial abuse, when a plain-clothes black police officer, Antoine Granomort, stepped in to help him. Granomort wasn't wearing a police uniform and PSG radicals attacked him. He tried to break up the group with tear gas but was overpowered. Granomort then fired one shot, seriously injuring Mounir Boujaer before killing Julien Quemener.