Roberto Mancini warns Real Madrid that Manchester City would not swap Sergio Aguero for Gonzalo Higuain Agüero, a £34 million signing from Atlético Madrid last summer, has emerged as a leading summer target for Real, however, with the Spanish newspaper Marca, traditionally close to the Bernabéu club, claiming on Friday that Higuaín is set to be offered as part of a bid to lure Agüero back to Madrid. Agüero's form this season has helped compensate for the lengthy absence of Tévez, who has not played for the first team since a Carling Cup outing against Birmingham last September. And while admitting he signed Agüero as Carlos Tévez's likely replacement last summer, Mancini insists that the pair can still play together at City. "When we bought Agüero, we thought Tévez would leave the club," Mancini said. I know him and I followed him a lot last year. But Agüero, Tévez and Mario Balotelli could all play together. We would have to work very hard, but they could play together. If Carlos is performing in two weeks, he will be valuable for us for the last six or seven games. I think he needs a minimum of another two weeks training and during those two weeks it is important he plays in two or three games for the reserves. He will play in the reserves next week and I don't think he will create a problem for the team as his behaviour is perfect. Meanwhile, Mancini admits Balotelli was "upset" by his omission from Italy's squad for the midweek friendly against the United States, but claims coach Cesare Prandelli was right. "Mario was upset," Mancini said. Prandelli obviously has his reasons, but Mario is the best striker in Italy. It is Prandelli's decision, but I think he is correct. We know that Mario is a top player, but he should improve his behaviour. And for the national team, behaviour is important because when you go to a major tournament maybe you only play three, four or five games and you should have good behaviour. But there is not another striker like Mario and I don't think Prandelli can leave him at home for Euro 2012.