Having been left out of the World Cup squad and for Euro 2016, Saul is ready to do his utmost to help the national team moving forward.
"It's not the time to talk about the past. I thought about it a lot in the summer, but I do not think we should talk about it anymore because it doesn't matter," he told a news conference before a clash with Croatia in his hometown of Elche on Tuesday.
"I had an unforgettable experience, I contributed what I had to contribute. In the European Championship I was out of the team and I realised many things – if I do well for my team, things will come.
"I don't know if I'm essential for the national team. I feel important at Atletico. Everything I do is for the good of my team, it doesn't matter about me being important in the national team."