Amid shameful scenes of chaotic violence, Chelsea surrendered their realistic chance of the title, their 77-match unbeaten home League record under Jose Mourinho, and a painful slice of their self-respect. They stumbled away from Stamford Bridge, aware that the consequences could be both costly and brutal. The ugliest incidents erupted in the last few moments of the game, shortly after referee Mike Dean had awarded Sunderland a mildly controversial but ultimately match-winning penalty. Rui Faria, Chelsea’s assistant coach, repeatedly tried to attack the referee, as Mourinho clutched first his arm and then a handful of his dark hair in his frantic attempts to restrain his fellow Portuguese.Amid shameful scenes of chaotic violence, Chelsea surrendered their realistic chance of the title, their 77-match unbeaten home League record under Jose Mourinho, and a painful slice of their self-respect. They stumbled away from Stamford Bridge, aware that the consequences could be both costly and brutal. The ugliest incidents erupted in the last few moments of the game, shortly after referee Mike Dean had awarded Sunderland a mildly controversial but ultimately match-winning penalty. Rui Faria, Chelsea’s assistant coach, repeatedly tried to attack the referee, as Mourinho clutched first his arm and then a handful of his dark hair in his frantic attempts to restrain his fellow Portuguese.Fabio Borini may never eclipse this contribution as a Liverpool player. The Italian loanee edged up to the penalty, awarded harshly against César Azpilicueta eight minutes from time and with those on the home bench still seething, to throw Mark Schwarzer off balance before easing the ball into the net. With that one conversion, while breathing life into Sunderland's desperate attempt to avoid relegation, the Italian simultaneously handed his parent club the initiative in the title race. The Premier League title is Merseyside's to claim. Sunderland manager Gus Poyet describes the last four days as "remarkable" after following up a midweek draw against Manchester City, with a 2-1 victory over Chelsea . Connor Wickham equalised after Samuel Eto'o had given Chelsea the lead. The Black Cats were then awarded a penalty when Cesar Azpilicueta fouled Jozy Altidore and Fabio Borini converted for victory. Sunderland remain bottom of the Premier League but are now only three points from safety.