 De Marcos akarova makumbo maviri e2011-12 Europa League round of 16 vachipesana neManchester United, sezvo Athletic yakakunda mitambo miviri uye yakaenda kuburikidza ne53 pahuwandu. Akapindawo muchikamu chinotevera vachipesana neFC Schalke 04, achitamba mumitambo gumi nemashanu yekubatana kubatsira timu yake kusvika kumagumo. Vakakwanisawo kupinda mumutambo unogumisa mukombe womunyika, vachirasikirwa neBarcelona. 