Barcelona could use Rafinha as a bargaining chip with Tottenham in a bid to land Christian Eriksen.
Spurs are keen on the Brazilian midfielder, who spent last season on loan at Inter Milan.
The Italians had an option to sign Rafinha permanently for €35m, but believe they can land the 25-year-old at a cheaper price.
Spurs have made Rafinha a transfer target but the player has also been linked with a move to West Ham United.