In a crazy, furious, and tight match in Turin on Tuesday, Cristiano Ronaldo and company were knocked out in the round of 16 by big underdogs Porto. Juve won 3-2 in extra time, but the match ended 4-4 on aggregate, with Porto progressing on away goals. It was certainly a controversial result, but one that will surely cause many people to question whether Juve can survive as a club. Ronaldo scored twice, but it wasn't enough to save his side from being eliminated. He played almost an entire hour before being substituted out for Luca Marrone. However, despite helping his team reach the quarterfinals, Ronaldo didn't seem too happy with the outcome and took to Twitter after the match to vent his anger. "I'm so sad because we lost today," he wrote. "But I respect the decision of my coach [Massimiliano Allegri]. We'll see what happens next season." Allegri responded by saying that he's always believed in Ronaldo's talent and that he'll still have a major role to play at Juve next season. "We've known each other for years and I always believed in him," Allegri said. "He's an important player for us and we hope he'll be back soon." This is not the first time that Ronaldo has been involved in a knockout phase exit.