#7 Kaka
Former A.C Milan star, Kaka would have been playing alongside Xavi and Iniesta had the club accepted a swap deal offered to them by AC Milan.
According to the Dailypost.ng Barcelona president, Joan Laporta had dinner with Milan owner Silvio Berlusconi when the Barcelona president proposed a player-exchange deal involving the Brazilian and Ronaldinho
Laporta said, " It started out as a bit of a joke, but Berlusconi quickly turned serious, Ronaldinho was a top player for Barcelona back then, and they were reluctant to let him go."
But in 2015, when Kaka was playing for Orlando City in the MLS, it is rumored that he was offered a chance to join Barcelona. He was working on an opportunity to get back into his national team 'Spain' during the season break in the MLS.
Kaka left Milan but joined Barca's fierce El Clasico rivals Real Madrid instead, where he flopped badly, falling down the pecking order in his final season at the Bernabeu and managing just three goals in 2012-13.
Later, on 17 December 2017, Kaká announced his retirement after turning down several offers from former clubs, Milan and São Paulo.