Barcelona are still struggling to meet Udinese's asking price for Alexis Sanchez.
Marca says Barcelona have proposed 26m, which is well short of the minimum 35m Udinese are looking for.
To help close the gap, the Blaugrana are looking to hand over one or more players as part of the deal.
However, it is proving tricky to find players that both clubs are happy with.
Jonathan Soriano was also linked with AS Roma, but now seems to be heading for Red Bull Salzburg.
Brazilian talents Henrique and Keirrison are options, but Udinese have rejected Alexander Hleb due to worries over his injury problems.
