 on a three-year deal during the summer transfer window, joining countryman Ernesto Valverde's roster.During his two-year spell, he played in a total of 68 games and netted nine times, but his performances were irregular overall.Helping to the Piraeus club to the double in his debut campaign, Óscar also scored in the UEFA Cup, in a 1–2 away loss against AS Saint-Étienne (2–5 on aggregate) for the round-of-32.