Portugal lost to Uruguay 2-1 in Sochi on Sunday (AEST) in the World Cup Round of 16 match and were eliminated from the tournament while Uruguay progressed to the quarter-finals.

"We played well, maybe even better than Uruguay, I think, but they scored twice," Ronaldo said.

"As a captain I'm proud of my team... It's not the time to talk about my future. I'm sure, the team will continue to be one of the best in the world with great players, team spirit and a will to win."

The 33-year-old played 154 games for the national team and scored 85 goals since making his international debut in 2003.

The 2018 FIFA World Cup kicked off on June 14 and will continue until July 15, with the matches being played in 11 cities across Russia.