Isco said he felt “alive”, after his first career hat-trick helped Spain thrash Argentina 6-1 at the Wanda Metropolitano Stadium in Madrid on Tuesday.
However, he admitted he might not know how to win Zinedine Zidane’s confidence back at Real Madrid.
“In Madrid I don’t have the confidence a player needs,” Isco said in a postmatch interview with Marca.
“The matches with the national team give me life. Here I have the confidence of the coach.
“I want to show that I’m a good player. Lopetegui shows me confidence with the minutes he gives me.
“Maybe I’m the problem in Madrid. I don’t know how to win Zidane’s confidence,” he said.
Isco also hailed the Argentines for putting up a fight and said it was not an easy win.
“Despite the result, this match wasn’t easy.
“They made things difficult for us, they were very aggressive.
“We mustn’t forget that this is part of our preparation for the World Cup. The victory can give us a lot,” he added.