Chelsea sold some big players last summer, including Mason Mount and Kai Havertz. After a slow start to life at Arsenal, the latter has really picked up recently, scoring an excellent goal against Burnley over the weekend. Nevertheless, former Chelsea goalkeeper Mark Schwarzer, who has been speaking on The Optus Sport Football Podcast, still thinks the Blues did “superb business” by selling Kai Havertz to Arsenal. They were able to get £65m for the German attacker, according to BBC Sport. Nicolas Jackson has come in to replace Havertz up front and has scored seven goals in the Premier League …