Rio de Janeiro: A judge has sentenced former Real Madrid and Brazil international full-back Roberto Carlos to jail for failing to pay child support. The 44-year-old owes his ex-partner Barbara Thurler around $20,000, according to documents lodged with the Itaperuna family court in Rio de Janeiro state, reports Xinhua. Carlos, a father of nine, has two children with Thurler. Judge Mayane de Castro said the family rejected a proposal by the 44-year-old to pay the sum in instalments. The retired World Cup winner's lawyer, Fernando Pittner, said the matter would be resolved without Carlos going to jail.