Both Barcelona and Man City have failed to produce the goods in the Champions League this season and it is fully expected that both will make a number of significant changes to improve on the current campaign. And, in a strange turn of events, both clubs could well do business with each other this summer in a swap deal. Barca have been keen admirers of City striker Sergio Aguero for some time and it is understood that fans, media men and officials at the club are keen to look at the possibility of making a move. Whilst, City are extremely interested in Barca full-back Dani Alves, who is expected to leave the club this summer. It is thought that Barca will enquire about such a swap deal that would see them pay cash and include the Brazilian full-back.