Julen Lopetegui struggling to get West Ham message across as familiar mistakes cost Hammers
Aaron Wan-Bissaka lost his man for Yves Bissouma’s goal shortly after the interval, a defensive mix-up between Jean-Clair Todibo and Alphone Areola led to an own goal three minutes later, and then Heung-min Son tied Todibo in knots before slotting in the fourth.