article_snippet: Cristiano Ronaldo is back on Portugal duty this week ahead of Cristiano Ronaldo 's crunch Euro 2016 qualifier clash against Serbia on Sunday night.
article_snippet: Cristiano Ronaldo was in the thick of the action at training following Real Madrid's 'El Clasico' defeat by Barcelona on Sunday night.
article_snippet: Cristiano Ronaldo takes on Ricardo Quaresma (left) and Vieirinha during training on Wednesday .
article_snippet: Cristiano Ronaldo has a chat with Portugul head coach Fernando Santos during the session in Lisbon .
article_snippet: Cristiano Ronaldo was waering Cristiano Ronaldo signature model Mercurial Superfly boots during the session in Lisbon .
article_snippet: Cristiano Ronaldo looked focused during Cristiano Ronaldo side's training session at their team base in Lisbon joining fellow team-mates Pepe, Ricardo Quaresma and Vieirinha.
article_snippet: Portugal and Real Madrid centre back Cristiano Ronaldo controls the ball as the Portugal coaching staff watch on .