Fernandez in dark over 'Little Buddha'
Saturday's 1-0 defeat to Athletic Bilbao left the Barcelona-based outfit bottom of La Liga, but Fernandez is keen to assess his squad before making signings.
De La Pena, formerly of Barcelona and Lazio, is currently without a club, but did undertake a week's trial with Celtic in August.
Fernandez knows of the player's availability, but his shortness of fitness due to lack of matches is a concern for the former Paris Saint Germain coach.
"Firstly it is important to evaluate the squad, but regarding Ivan I do not know anything," explained Fernandez.
"He's not played for three or four months and would need time to get fit, at least a month."