Real Sociedad boss David Moyes is keen on a long Copa run.
La Real meet Villarreal tonight.
Moyes said: "I would like to do well in the Cup, so I have to find a happy medium and get the balance between giving our young players a run-out and having enough experienced players in the team to give us a chance of getting to the next round.
"If it was possible, I would love to go and win the Cup - I'll be telling the players that we want to stay in the Cup as long as we can. I want up to build momentum in the league and in the Cup because ultimately what we're trying to do is to start getting back-to-back wins."