Claim: In international football games, Christiano Ronaldo represents Portugal.
Evidence: Ronaldo made his international debut for Portugal in August 2003 , at the age of 18.
The Portugal national football team -LRB- Seleção Portuguesa de Futebol , -LSB- sɨlɛˈsɐ̃w puɾtuˈgezɐ dɨ futɨˈbɔl -RSB- -RRB- represents Portugal in international men 's association football competition since 1921.