"To win the Champions League, you need five or six world-class players," said Moyes, who took over the club in July.
Not title-retaining form
Manchester United have become only the second top-flight English champions - after Blackburn in 1995-96 - to begin the following season with three (or more) defeats in their opening six matches since Leeds did so in the 1974-75 season.
Source: Infostrada Sports
"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."
Moyes replaced Sir Alex Ferguson, who retired at the end of last season following 26 years in charge at Old Trafford.
Ferguson won 13 league titles, two Champions League crowns, five FA Cups and four League Cups during his tenure.
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