The Red Devils fell to a 2-1 defeat at home to West Brom on Saturday afternoon - making it three defeats in their first six Premier League games.
The former Everton boss has today said that United may lack the quality to win the Champions League.
"To win the Champions League, you need five or six world-class players," he told several national newspapers.
"Look at Bayern Munich, they have it. Look at Barcelona, who had it in the past and Real Madrid, who have maybe got it now. That's the level you have to be at to win it. We've not got that yet but what we have got is experience."
Is he being realistic, or displaying a small club mentality? Would Sir Alex Ferguson ever have said something like this?
Manchester United as an institution is about winning, about leading the way, and competing with the best. Moyes' comments don't promote that philosophy - and after just six games, the big questions are already being asked.
United travel to Shakhtar Donetsk on Wednesday in the Champions League. What sort of a message is Moyes sending to his players, by telling them they can't win Europe's top club competition?
What do you think Manchester United fans? Is the job too big for Moyes? Or do you have faith in the Scot to turn it around?
Let us know your thoughts.
image: © Paolo Camera