A 3rd Premier League defeat in simply seven video games means that is United’s worst begin to a season for 29 years.
A fifth-minute strike from Felipe Anderson and a Victor Lindelof personal aim put West Ham 2-Zero up earlier than half-time.
Second-half substitute Marcus Rashford pulled a aim again for United earlier than Marko Arnautovic sealed the win for the house aspect.
Mourinho’s relationship with star midfielder Paul Pogba will as soon as once more be within the highlight after the Frenchman was substituted within the 71st minute.
Earlier this week, Mourinho stripped the World Cup-winning midfielder of his vice captaincy position earlier than footage emerged which appeared to indicate the 2 having a disagreement on the coaching floor.
Mourinho was stopped from taking any questions on Pogba by United’s press officer.
“I believe we’d like a very good begin, and we did not get that good begin,” Mourinho advised a press convention.
“After the consequence on Tuesday, the crew wants constructive issues, constructive emotions.”
He additionally identified a attainable offside within the construct as much as Anderson’s opener, though he did concede his crew have been “not good in transition, not good after we lose possession and the opposite crew counterattack.”
The defeat means United sits 10th within the desk, 9 factors behind early chief Manchester Metropolis.
After successful the Europa League, and League Cup in first season at United, Mourinho led the Pink Devils to a second-place end within the Premier League final season — albeit 19 factors behind fierce native rival Metropolis.
Now in his third season on the membership, Mourinho has been closely criticized for poor outcomes and for the crew’s conservative fashion of play.
Liverpool held at Chelsea
Elsewhere, Liverpool’s successful run was halted by Chelsea in an entertaining 1-1 draw at Stamford Bridge.
Jurgen Klopp’s Liverpool has been the early Premier League pacesetter, successful every of its opening six matches.
Liverpool threw every little thing at Chelsea seeking an equalizer, with Xherdan Shaqiri capturing vast from shut vary when it regarded simpler to attain.
The breakthrough got here in 89th minute when substitute Daniel Sturridge fired in a elegant 25-yard strike moments after coming onto the pitch. It was Sturridge’s 50th Premier League aim for the Reds.
The consequence means Liverpool sits second, stage on factors with chief Metropolis, with Chelsea in third and nonetheless unbeaten.