The Red Devils striker is set to serve a three-match ban during the start of Euro 2012 and the Italian hopes to assess his other options in the upcoming matches at Wembley
"I spoke to him and told him he would not be selected for this game and he understood this," the Italian told FATV. "I want to see some players who can play in the Rooney position. I want to know the value of some players because Saturday's game against Spain will be really important.
The FA has appealed the Manchester United forward's three-match ban which would keep him out of England's group stage fixtures at Euro 2012, but Capello is looking to prepare for life without the talismanic striker.
"Spain play a different style to other teams and the Rooney position will be really important not only in this game but when we play in the Euros in Poland," he continued. "I want to see something different."
The former Real Madrid coach insisted he would also make a decision on whether Rooney would make the squad for Euro 2012 after the result of his upcoming appeal.
"Rooney is an important player and we are waiting to hear from Uefa on the appeal from the FA," he said. "I will make a decision on Rooney after I know everything."
Capello went on to hail the playing style and success of Spain, who beat the Three Lions in a friendly 2-0 in February 2009, comparing its pass and move ethos with Catalan giants Barcelona.
"I don't know how many players played in the last game, I think Frank Lampard was captain and maybe two or three others," said Capello of the last meeting between the two sides. "It will be difficult for us because Spain have improved quite a lot. They have won the Euros and the World Cup which has given them confidence. It will be important for the players playing on Saturday to know the value of the World Cup winners.
"Spain play the new style, which is to press and get the ball with the forwards. It is really difficult to beat Barcelona, who play this style, and Spain because seven players come from that Barca side. They have transferred the style from Barcelona to the national team. It will be really interesting to see the defenders when they receive the ball and they will be pressed from the opponents.
"It is impossible to copy Spain's style because it comes from long periods of training from the Barcelona school. They start at the academy and transfer the style to the seniors."