The Real Madrid striker headed in Joao Moutinho's long cross just four minutes in to score what turned out to be the only goal of the match.

Ronaldo's 85th international goal made him Europe's all-time leading international goalscorer as he broke Hungary legend Ferens Puskas's 62-year-old record.

Ronaldo, who is 33, also scored all three goals for Portugal in their opening 3-3 draw against Spain and is the early front-runner for the Golden Boot award for most goals at the World Cup.

Spain will play Iran, who beat Morocco 1-0 in their first game, in Kazan later on Wednesday.