Mainoo had his England first-team debut during the March internationals.
Manchester United star Kobbie Mainoo was called up to England squad by Gareth Southgate for the March friendlies against Brazil and Belgium.
He played in both games and was named MOTM in the 2-2 draw with Belgium.
United prepare to face Brentford on Saturday, March 30, 2024.
Speaking ahead of the game, ten Hag said: “I thought it was very good [display for England] but we are not surprised. We know what he is capable of, he can very quickly adapt to high levels. It looks very natural and we are very happy for him.”