The 24-year-old, who joined Chelsea from Marseille in 2012, was arguably the best full-back in the Premier League last season, with his performances ousting Ashley Cole from the Blues XI.
"This year I played on the left. The coach thought I could help in that position and I was glad to do it. I'll play in more positions," he told AS.
"Of course I will fight for my place because I am ambitious and I want more. When I was 15 or 16 playing in the senior team was a dream when we all start at the lower levels.
"It's a dream to go to the World Cup. I hope we all get there in the best possible condition."
Azpilicueta has played at every level for Spain from the Under-16s.