Did Louis van Gaal underestimate the Hammers?

Manchester United usually get a good result when they play West Ham.

Last season, Wayne Rooney scored THAT wonder goal against them, yet maybe this season Louis van Gaal has underestimated Sam Allardyce’s side.

He chose an attacking line up, but West Ham were all over Manchester United.

Manchester United struggled to break through and push forward to create chances within the 90 minutes.