Kai Havertz’s double against former club Chelsea prompted Arsenal fans to unleash a raucous chant mocking the Blues. Havertz, who has struggled since his £65 million move to north London, tormented his old employers with two second-half goals. The German forward celebrated his first strike with a knee slide in front of the Chelsea fans, who have often criticized his performances. Arsenal supporters then rubbed salt in the wounds with an X-rated chant: “He left ’cause you’re s***, he left ’cause you’re s***, Kai Havertz, he left ’cause you’re s***.” Havertz has now scored 11 Premier League goals this season and was directly involved in as many strikes in his last ten appearances. His brace against Chelsea makes him the first ex-Blues player to score a double against the west Londoners in the Premier League.