Kammala jumla mai zuwa: A ranar 4 ga Janairu 2021, an nada Marcelino babban kocin Athletic Bilbao a kan kwangila har zuwa 30 ga Yuni 2022. A wasanninsa uku na farko, ya yi rashin nasara a kan Barcelona a gasar zakarun gida kuma ya ci nasara da abokin hamayyarsa da Real Madrid zuwa
lashe gasar Supercopa de España. Ya kuma kasance a benci don wasan karshe na gasar cin kofin Spain guda biyu a cikin makonni biyu (na farko da aka jinkirta saboda cutar COVID-19), ya rasa duka biyun.