Chelsea scoring and conceding at remarkable rate under Xabi Alonso

Chelsea have scored 15 goals and conceded 13 in six Premier League matches this season — 4.7 goals per game — under Xabi Alonso. Their 18.3% conversion rate is second only to Manchester City's 19.1%, with eight of their 15 goals coming from low-probability chances. The question is whether such over-performance against expected goals can last.