Manchester United manager admits the World Cup has come at the worst possible time for teenage talent Alejandro Garnacho after his 93rd-minute winner against Fulham.
Garnacho, 18, emerged in the second-half at Craven Cottage with the game deadlocked but exchanged passes with Christian Eriksen to prod in an added-time winner to leave United three points off fourth in the Premier League table.
The Argentina international scored his first United goal against Real Sociedad last week and came on to transform their League Cup tie over Aston Villa on Thursday night before claiming his first Premier League goal.