Manchester United secured another four-goal romp for the second Premier League weekend in a row as they swept aside Jordan Ayew's Swansea.
Swansea almost took an unlikely lead in just the third minute when Jordan Ayew broke clear down the left before seeing a cross with the outside of his right foot strike the underside of David de Gea'a crossbar before being cleared.
The visitors took the lead on the stroke of half-time courtesy of Eric Bailly's close-range finish.
And the Red Devils stepped it up in the second half when Romelu Lukaku, Paul Pogba and Anthony Martial all scored late on to seal a comfortable win.
The home team managed to avoided conceding a soul-destroying fifth, but United and Mourinho will be delighted with another powerful performance during the opening weeks of the new season.