Cecilia Guillenea

Cecilia Guillenea (born 24 January 1981) is an Uruguayan former professional tennis player.

Guillenea played for the Uruguay Fed Cup team between 1997 and 2000, winning four singles and six doubles rubbers, from a total of 15 ties. She also represented Uruguay at the 1998 World Youth Games and was a bronze medalist at the 1998 South American Games in Ecuador, partnering Daniela Peyrot in the women's doubles.

Competing on the ITF Women's Circuit, Guillenea reached her best singles ranking of 425 in the world in 2000 and won both of her two career titles that year, at Lima and La Paz. She won a further two ITF tournaments in doubles and had a career high doubles ranking of 395.

ITF finals Singles: 2 (2–0) Outcome No. Date Tournament Surface Opponent ScoreWinner 1. 13 August 2000 Lima, Peru Hard Paloma Collantes 6–2, 6–1Winner 2. 20 August 2000 La Paz, Bolivia Clay Sabrina Eisenberg 2–6, 6–2, 6–3

Doubles: 2 (2–0) Outcome No. Date Tournament Surface Partner Opponents ScoreWinner 1. 13 August 2000 Lima, Peru Clay Tiffany Dabek Vanina García Sokol Claudia Salgues 7–6, 6–2Winner 2. 20 August 2000 La Paz, Bolivia Clay Tiffany Dabek Nathália Bellizia Ana Paula Novaes 6–3, 6–3