AC Milan midfielder Emerson believes Real Madrid could succeed where Manchester City failed and lure Kaka away from the San Siro.
City were prepared to smash the world transfer record to take Kaka to England but were rebuffed as the Brazilian opted to stay at Milan.
However, Emerson feels the pulling power of his former club Madrid, who have long been linked with a move for Kaka, means they would stand a much better chance of landing his compatriot if they were to launch a bid.
''I've said all along that Madrid have wanted Kaka for the last two years. To be a real top player you have to play for Madrid. If Kaka has the chance to go to Madrid, he shouldn't think twice about it,'' said Emerson, who spent a season at Madrid before joining Milan in 2007.
''It depends on the will of the player. It wouldn't be bad for him to stay here, but Madrid are the best. All the players feel good if they play for a team like Madrid. Milan are the second biggest team in the world behind Madrid.
''When Madrid come knocking, you cannot say no to them. It isn't easy because they are a great team. If Madrid arrive with 100 million (euros) or a good offer it is difficult to see him staying here.''
''He couldn't go to Manchester City as they are not playing in the Champions League and are not a big club. Kaka, if he goes, will go to a big club because he is a phenomenal player.
''Kaka is very intelligent. He is very young, he does not only have to think about money. Madrid's interest is not official, but he is thinking of a future at Madrid.''
Emerson comments were carried by Spanish sports paper AS, who yesterday claimed that David Beckham believes Kaka will move to the Bernabeu in the summer.
Milan's new signing Thiago Silva, who is expected to make his debut for the Italian giants on Wednesday, believes Kaka's decision to snub a move to Manchester City will help him settle at the San Siro.
Silva, who joined the Rossoneri earlier this year from Fluminense, is expected to start in Wednesday's friendly in Germany against Hannover 96.
''I am ready,'' Silva said. ''This is an important day for me. It's a friendly but it will be my first game with the AC Milan colours. I hope all goes well.''
The Brazilian defender will not be able to play an official game this season for the Rossoneri because of Italian rules over the number of non-European Union players signed by clubs.
But the 24-year-old is in the meantime enjoying training with a star-studded squad: ''I'm happy to be training with a team that has great players. It helps to have compatriots in the team and I am really happy that Kaka has stayed.
''Kaka is football and with him, I hope that Milan can celebrate a success by season's end.''
Kaka's other team-mates have also reacted positively to Kaka's decision to snub a lucrative world record transfer to Manchester City.
The Rossoneri playmaker turned down the chance of a reported £500,000-a-week salary to remain at the San Siro and veteran defender Paolo Maldini is glad he did so.
''There was a point in which I feared that he would leave because I really didn't expect this situation to arise,'' said the Milan captain.
''Fortunately, it has ended well. Ricky (Kaka) has an incredible effect on children. My son Christian started crying when he heard the news and when he found out he was staying he was really happy.''
Andriy Shevchenko, who left the San Siro two years ago to move to Chelsea only to return last summer to the Rossoneri, said: ''Kaka has done the right thing. Kaka did ask me many questions but his situation and my situation are somewhat different.
''I believe he chose what was in his heart. With him, Milan are always stronger.''