The forward has bemoaned the fact that the does not have the same level of support at international level as he does club level, but still thinks he can lead the Seleccao to glory
The Ballon d'Or holder inspired his club to Champions League glory last season, breaking the goals record for a single campaign (17), but he suffered a first-round elimination with the Seleccao at this summer's World Cup.
Ronaldo freely admits that he does not have the same level of support at international level but he has not given up hope of leading Portugal to a major title.
“It’s not easy," the 29-year-old told The Telegraph. "Compare the quality we have at Real to the national team, and it’s not the same. I’m together with my national team-mates only sometimes.
"We have only 10 million people in Portugal, so to find the top players is a struggle.
"This is the key to why Portugal have never achieved any important trophies, like the World Cup or European Championships.
"But we still believe. We have to be confident that one day it will happen. Maybe Euro 2016 is the time we’re going to win something. I’m looking forward to that. I think it’s possible."
Ronaldo played a key role in Portugal's qualification for Brazil 2014, scoring a sensational hat-trick in the second leg of their play-off clash with Sweden.