Arsenal were dealt another injury blow in their title run-in after Kai Havertz hobbled off in the first half of their Premier League clash with Newcastle. Havertz went down off the ball on 33 minutes, picking up an issue in his upper leg, though the cause was uncertain. Follow live - Eze rocket breaks deadlock as Arsenal lead Newcastle in crucial clash After receiving treatment, the Germany international limped off the field accompanied by an Arsenal physio before heading straight down the tunnel. Viktor Gyokeres replaced the 26-year-old, who assisted Eberechi Eze ’s stunning opener at the Emirates Stadium in the ninth minute. Kai Havertz receives treatment at the Emirates (PA) Havertz was visibly dejected as he made his way off the pitch and down the tunnel, with it uncertain how serious this latest setback could be - or whether it could impact his availability for this summer’s World Cup.…