Erik ten Hag will bring his Ajax assistant Mitchell van der Gaag with him to Manchester United - almost nine years after the Dutchman suffered a heart scare on the touchline.
Van der Gaag was in charge of Lisbon-based Belenenses in September 2013 when he was taken ill during a game against former club Maritimo.
He was fitted with an implantable cardioverter defibrillator - the same device that has enabled Brentford's Christian Eriksen to play again following his cardiac arrest at the Euros. Van der Gaag has regular medical check-ups - and over the last three years has become an influential sounding board for Ten Hag at Ajax.
