Manchester United fullback Luke Shaw says manager Louis van Gaal is always serious.

Shaw claims Van Gaal has never wavered in his focus both on the training ground and on match days.

"The manager is always focused on his job, and his job is to win games," Shaw told Match of the Day magazine.

"I haven't seen a cheeky side to him yet, but you could say he has one!

"When we're on the training pitch it's like a game day, 100% focus, nothing will change his mind or his focus, he's always on the ball."