Ten Hag told reporters: "You can see it. We missed, for over a long period, very important players like Casemiro, like Lisandro Martinez, like Luke Shaw, also others. We discuss that often, but you see the impact of a player when he’s there. Like Casemiro, he gives you calmness and composure on the ball, he gives you options, he sees the vertical pass.
"He is always a step ahead of his opponent and breaks lines. We talk just about the offensive, how they have to serve, but then Casemiro is a very important player for our game so we’re happy he’s back.
"For Kobbie Mainoo, he can learn a lot from it and that togetherness, that bond… also Kobbie is very coachable and Casemiro has so much experience. Kobbie will learn a lot from it and that can even accelerate his development. So yeah, I’m happy to have him back and when they can play together I think they can take benefits from each other."