"I have known about Nani and Anderson for a long time," he said.
"They are special players, with great gifts and fantastic talent. Of their generation, we believe they are two of the best.
"Just like Cristiano Ronaldo, they are just the type of players we should be looking to bring to Manchester United."
Despite Anderson not linking up with the squad yet and Nani still nursing a sore ankle Queiroz strongly believes in their ability.
"They are both skilful players and their technique is excellent," said Queiroz.
"Nani in particular is very quick; truly outstanding speed. Anderson has power and a fantastic left foot.
"In a way, they are both artists before they are footballers, which is fantastic."