Sporting director Rafa Alkorta has also listed Javi Martinez and Ibai Gomez as potential signings this month.
The La Liga club's transfer policy limits them to signing Basque players only and Alkorta says they will get to work on any potential transfers this week.
"Nothing is easy but we are interested in having all of the ones that can come. We have not made any moves yet. We will start on Tuesday and we will see what can be done."