Manchester United assistant coach, Ruud van Nistelrooy is having doubts about replacing Erik ten Hag at the Premier League, Goal reports. Van Nistelrooy is the leading candidate to replace his compatriot who is under pressure, but he has reservations about stepping into the role. Ten Hag brought the former PSV manager in this summer as he made his changes to his coaching crew. However, with Ten Hag under pressure after the Red Devils lost three of their first six Premier League fixtures, Van Nistelrooy is being touted as his replacement. It was reported this week that Ten Hag has one game to s…