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Ronaldo has now scored three times in two games to help Portugal become the first team to reach the semi-finals.
He looks a strong contender to be the tournament's finest player but has some stern competition from players representing countries still left in the competition.
While stars such as Alan Dzagoev of Russia and Mario Mandzukic of Croatia have gone home despite their early heroics, some of Europe's best are still in contention.
Midfielders such as David Silva, Andrea Pirlo and Steven Gerrard have all contributed with goals and assists, while Germany striker Mario Gomez has also hit a hot streak.
But with three quarter-finals remaining, who do you think will emerge as the best player at Euro 2012?
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Yesterday we asked you for your thoughts on how far England will progress in the competition.
Many of you appear to be pessimists, predicting England's adventure will end with Sunday's quarter-final against Italy.
Results of the poll