"Very often the teams were named beforehand in Spain," said Moyes, who managed Real Sociedad in 2014-15.
"We see it in other sports too. It doesn't happen in our sport for different reasons, but overall, does it make it easier? I don't think so because they're a good team.
"We'll keep our team until we're ready to announce it and we'll prepare our players for the game."
Then, Moyes jokes: "It might not be his team! It could be a bluff."