Juan Silveira dos Santos (; born 1 February 1979), commonly known as Juan, is a Brazilian former professional footballer who played as a centre-back. He currently works as Flamengo's Technical Manager. Having begun his career with Flamengo, he spent a decade playing in Europe in service of Bayer Leverkusen and Roma before returning to Brazil with Internacional in 2012. Juan earned 79 caps and scored seven international goals for Brazil. He represented the nation at two FIFA World Cups, three FIFA Confederations Cups and three Copa América tournaments, winning two apiece of the latter two events. Club career Early career Born in Rio de Janeiro, Juan played for six years for Flamengo in Brazil. In 2002, he moved to Bayer Leverkusen. He played five years in Germany scoring ten goals for Bayer. In 2007, he moved to Roma for €6.3 million. Roma Juan played for Roma between 2007 and 2012. In all competitions for Roma he scored 11 goals in more than 140 appearances. With Roma he won one Coppa Italia and Supercoppa Italiana. He was a first-choice centre-back for Roma, and wore the number four jersey. Juan scored his first goal for Roma against Reggina on 16 September 2007. In the 2011–12 season, he usually played alongside Gabriel Heinze. He scored his seventh goal for Roma in a 5–1 win over Cesena on 21 January 2012. He scored again in Roma's 4–2 loss Cagliari in Sardinia, followed by his third goal of the season, and the opening goal, in Roma's 4–0 demolition of Internazionale at the Stadio Olimpico. He scored nine goals for Roma during his time there. Internacional On 16 July 2012, Roma and Juan agreed to cancel his contract by mutual consent, which was set to end on 30 June 2013. On the same day, Juan signed a two-year contract with the club of Porto Alegre Internacional, with a one-year option. Return to Flamengo On 11 November 2015, Juan and Internacional agreed to cancel his contract by mutual consent, almost a month later on 8 December 2015, Juan confirmed his return to Flamengo. Juan announced his retirement after winning the 2019 Campeonato Carioca and played his farewell match on 27 April 2019, in Flamengo's 3–1 win over Cruzeiro. International career Juan played on Brazil's Copa América-winning teams in 2004 and 2007, also winning the FIFA Confederations Cup in 2005 and 2009. He scored the winning goal in