The goalkeeper is expected to join Real Madrid this month, but is currently undergoing injury rehab.
Ziganda said, "Taking a conservative guess, his treatment was to be for four weeks (which has already been met) and we'll see next week.
"The player is here and he is ours, it has been four weeks and we will have to see how he works. He has to make a decision and when he takes it, he will tell us. There are renovations, the day to day of the club continues.
"The rest of the injured have muscle problems, we will have to be patient with them."