Adriano says he would welcome the arrival of De Gea.
"De Gea is a great goalkeeper, but it's down to Zubi (sporting director Andoni Zubizarreta)," he said.
"I personally really like him (De Gea) as a keeper. It was a great game (between Real and United), and the tie is very open. We now have to think about our own game. The match at Old Trafford should be a good one, too."