Manchester United produced a strong performance to beat West Ham and midfielder Casemiro played a key part. It may not have been a coincidence that Manchester United’s cleanest, most controlled performance of the season came with Casemiro in midfield. The Brazilian has recently returned after more than two months out, and is working his way back to full fitness. There are always high expectations on the five-times Champions League winner, which means any slight imperfection with his game or the team’s performance gets scrutinised. Yet overall, his display in the 3-0 win over West Ham one was a…