Mourinho said "football is changing, and managers should be called head coaches" after beating Leicester, who he flagged as a side that should not be underestimated as they "invest more than us".
"I am [also] very pleased for Luke", Mourinho said. "We have to wait until the end of November to understand if we can fight for the title".
After sealing deals for Fred, Diogo Dalot and Lee Grant by early July, last season's Premier League runners-up were unable to add further despite the Portuguese's explicit desire to bring in two more players. They [Leicester] spent more money than us, so in the Premier League we must get used to teams with players of the same quality that we have.
With his open to interpretation message, Manchester United fans replied and asked if this meant he wasn't happy at the club and wanted to leave.
Yes, they went ahead inside the first three minutes through Paul Pogba's penalty, but what was important was the way they went after Leicester right from the off.
Having led France to World Cup glory only a few weeks ago, the 25-year-old wasn't expected to feature for United until gameweek two at the earliest. "We thought he would manage maximum 60 minutes and he went much longer", said Mourinho.