Mariana Duque Mariño

Mariana Duque Mariño (Spanish pronunciation: [maˈɾjana ˈðuke maˈriɲo]; born 12 August 1989) is a Colombian former tennis player. Having turned professional in 2005, she reached a career-high singles ranking of world No. 66 in October 2015.

Duque debuted on the ITF Junior Circuit in 2004. As a junior, she reached the final of the girls' singles tournament at the 2007 French Open. She defeated the tenth-seeded Ksenia Pervak in the first round, and ousted juniors' world No. 1, Anastasia Pavlyuchenkova, in the semifinals. Duque lost in the final to Alizé Cornet in three sets. She had some setbacks during the tournament, due to losing her tennis rackets at the airport. Without money to buy replacements, she had to play with borrowed rackets.

She won her first professional tournament in May 2006, in Mazatlán, Mexico. Her biggest win in senior competition is defeating 26th seed Anna Chakvetadze in the opening round of the 2009 French Open, in three sets.

In 2005, she appeared in her first WTA Tour qualifying in Bogotá and also played on the ITF Women's Circuit. In the 2005 Bolivarian Games, she won the silver medal in singles and in doubles.

Duque fell 2006 in the qualifying in Bogotá, won three singles and three doubles titles on the ITF Circuit.

In her third full season on the tour, she arrived in the first round defeating compatriot Viky Núñez Fuentes and was beaten in the second by Flavia Pennetta. The same year, she won three singles titles on the ITF Circuit. At the Junior French Open, in her first appearance in a Grand Slam tournament, she finished runner-up, making history for Colombia as the first tennis player to reach such instance.

In Pan American Games, she arrived at the end confronting Venezuelan Milagros Sequera; the top-seed and favorite took home the gold medal for Venezuela and Mariana the silver medal, being one of the best achievements in her career. She also got the silver medal in doubles with compatriot Karen Castiblanco.

At the US Open, Duque Mariño advanced to the second round by coming back to beat Tamarine Tanasugarn, ranked 19th in the world, after having lost the first set 0–6. In the second round, she lost in straight sets to Agnieszka Radwańska, ranked No. 9 in the world. Thanks to this presentation, she got into the top 100 players in the world for the first time by moving up two sports: 101 to 99.