Having been shown exactly what is possible with a true defensive midfielder by Manchester United, the play was evident.
Whereas the Blues needed to pack out their midfield to cope with Erik ten Hag's system, Casemiro alone allowed United to build from a steady base with Christian Eriksen as a silent architect for tempo and Bruno Fernandes the maverick creator.
Meanwhile, for Chelsea, it took them a three man midfield of Jorginho, Ruben Loftus-Cheek and Mateo Kovacic before a foothold was gained and they could think about holding back their opponents. None of Graham Potter's midfielders have the accumen to play the role that Casemiro did and that's all too evident.
