Ronaldo denied by woodwork
The 25-year-old, who has not scored for his country in 16 months, crashed a long-range effort against the post with 11 minutes gone shortly after being cautioned.
Ronaldo was confronted by Ivorian defender Guy Demel after Uruguayan referee Jorge Larrionda had waved away his claims for a foul as he surged forward, and both men were cautioned.