Muto and Kenedy struck early to deepen United's crisis
Both goals came inside the first ten minutes of the Premier League clash, in another disaster for the Manchester club after a turbulent few weeks.
For the first goal it was far too easy for Brazilian Kenedy to get in behind the defence. Well onside, he collected Ayoze Perez's pass and fired a brilliant curling strike low accross David de Gea.
If this wasn't enough of a disaster, Yoshinoru Muto made their life even harder three minutes later.
The Japanese striker collected the ball with his back to goal, swivelled and sent a powerful strike past De Gea, sending the away fans into rapture and the home faitfhul even further into despair.