Portugal face Serbia on Sunday in crucial La Liga I clash . Victory for Portugal would see them move up to nine points . Cristiano Ronaldo has scored 31 Euro 2016 Group goals in 25 matches this season . READ : Ronaldo back in action for Portugal ahead of Euro 2016 qualifier . WATCH : Ronaldo pranks Portugal team-mate Ricardo Quaresma .
Portugal face Serbia on Sunday in crucial Euro 2016 Group I clash . Victory for Portugal would see them move up to nine points . Cristiano Ronaldo has scored 31 La Liga goals in 25 matches this season . READ : Ronaldo back in action for Portugal ahead of Euro 2016 qualifier . WATCH : Ronaldo pranks Portugal team-mate Ricardo Quaresma .