Erik ten Hag wanted Steve McClaren to form part of his backroom staff at Manchester United because he has the experience of winning titles in his career.
The 61-year-old is returning to Old Trafford more than 20 years after he was Sir Alex Ferguson's assistant manager and the club were initially reluctant to grant Ten Hag his wish to appoint McClaren.
But United have confirmed McClaren and Mitchell van der Gaag - who was Ten Hag's No. 2 at Ajax - will form part of his backroom team as assistant coaches.