That was rammed home again when fans turned out to greet his team in their arrival in Donetsk on Tuesday evening.
"It is always the thing at Manchester United," said Moyes.
"Everyone is interested in them. It is a talking point for everybody throughout the world.
"That is why it is, for me, the greatest club.
"It is a great honour to be the manager. Even our arrival here in Donetsk has been greeted with a lot of supporters at the airport.
"It is a great thing."
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