Returned to Athletic for the 2009–10 campaign, Zubiaurre's season input consisted of 15 minutes against FK Austria Wien (3–0 win at home) in the UEFA Europa League group stage.
Returned to Athletic for the 2009–10 season, Zubiaurre's playing time amounted to 15 minutes against FK Austria Wien (3-0 victory at home) in the UEFA Europa League group stage.