But Ancelotti, who compared Spain's Alvaro Morata to Poland and Bayern star Robert Lewandowski, says the reigning champions are not the team they were four years ago and that Italy have every chance of making the quarter-finals.
"I keep getting told that Italy have a really hard draw facing Spain in the Euro 2016 second round in the Stade de France on Monday," he wrote in The Telegraph.
"My only response is, yes, but Spain have a really tough draw, too. Italy will play to their strengths in defence and close the space between the lines. They do not have the players to dominate possession.
"Spain cannot change. They play just one way, which is to probe and pass and keep the ball.
"They have tried to vary it a little bit in recent games with more direct passes to Alvaro Morata. He is a good player who can do well. I did not have a lot of opportunity to play him at [Real] Madrid, but he is the kind of guy who comes alive in the box, like Robert Lewandowski.
"Spain will control the midfield, I am sure. Andres Iniesta and Sergio Busquets have been doing that for years.
"I have noticed, though, that as a team they are not quite so aggressive as they were four years ago when it comes to winning the ball back again. Maybe Italy can use that to their advantage."
The winner of Monday's match will face Germany or Slovakia in the last eight.