Erik ten Hag believes Casemiro will benefit from his first Premier League appearance as he becomes accustomed to the challenge of a new country and new teammates.
The £60million Brazilian made his Manchester United debut as he came on for the final 10 minutes of the 1-0 win against Southampton at St Mary's.
Casemiro produced a couple of vital interceptions, with United under pressure in the closing stages, and he also showed his leadership in communication with the defence and David de Gea.