The Black Cats are reportedly chasing the Spaniard but will have to fight Valencia and Rubin Kazan for a deal.
Sunderland have reportedly earmarked another potential transfer target this summer, with talkSPORT claiming that the Wearside club are looking to bring Sevilla midfielder Vicente Iborra to the Stadium of Light.
Sam Allardyce is thought to be keen to strengthen his midfield options ahead of next season as the club aim to avoid being dragged into yet another relegation battle.
Iborra fits the bill for the Black Cats' boss, with the 28-year-old boasting experience of playing in a winning side and able to play with distinction in both defensive and attacking midfield.
The Spaniard has spent all of his career to date in his home country with first Levante and then Sevilla, and with his current club he has become an important member of a squad which has won the Europa League title three years in a row.
Last season Iborra scored nine goals in 47 appearances in all competitions from midfield, and that form has attracted the interest of Sunderland.
However, talkSPORT suggests completing the deal could be difficult for several reasons, not least because La Liga side Valencia and Russia club Rubin Kazan are also keen on the midfielder.
Things are completed further by the fact that Sunderland are also currently trying to seal a permanent deal for Kazan midfielder Yann M'Vila, who spent last season on loan on Wearside.
Kazan are presumably highly unlikely to allow the Black Cats to take M'Vila for good if they will then be beaten to one of their primary transfer targets in a similar position by the same club, and so it could well come down to Allardyce needing to make a decision as to which target he is more intent on signing.