Johnny Heitinga has joined the list of former players and coaches to question Donny van de Beek's summer move to Manchester United and admits he is concerned about the midfielder's development.
The Holland international was frustrated by limited game time at the beginning of the season following his £40million transfer from Ajax, before enjoying a run in the side which began late last month.
However, that run of games came to an end on Saturday evening when he was an unused substitute in the tepid stalemate with Manchester City at Old Trafford, leaving him with just one goal and one assist in 16 appearances for Ole Gunnar Solskjaer's men.