Their latest demolition against Everton was, while far from their most attractive, perhaps the most impressive.
Ahead of the game this weekend, Mourinho claimed in his program notes that the Merseyside club would be aiming for nothing less than a Champions League place after they spent heavily during the summer.
"Koeman communicates well, he's a steady hand on the tiller, although he's maybe not as good as he thinks he is - he's still got a lot to prove as a manager".
Now, tomorrow's League Cup clash at home to second-tier Sunderland takes on huge importance with bookmakers William Hill making Koeman second favorite to be the next manager sacked.
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It has raised rates three times since last December, twice this year. "Maybe the Fed would be happy to see a bear market that could be blamed on Trump".
"I'm sorry. If there's anybody in this room and outside and sees this as something realistic for us, please comment". Be realistic. I'm not happy how we started the season, but please be a bit realistic about Everton.
He said about Everton's poor form as well as his performances, "We have had games where we've played well and a few games where it hasn't gone so well".
Koeman's United counterpart Jose Mourinho said that EPL clubs are becoming increasingly defensive and he is glad his side is able to score goals freely this season.
Everton may have made some impressive signings this summer but their failure to add sufficient pace to their squad and - most importantly - to replace the goals and all-round play of Romelu Lukaku means they are struggling with just a month of the campaign gone.
"It was a case of showing our fans that we are here, that we fight for the ball and fight for the shirt". Four title contenders, with the Europa League in between.