Marta Marrero (born 16 January 1983) is a Spanish a professional padel player and former tennis player.

In tennis, she reached the quarterfinals of the French Open, won two WTA doubles titles, and also a total of 14 ITF singles and doubles titles. Her highest singles rank on the WTA Tour was world No. 47, which she reached in 2004. Her highest doubles ranking was No. 47, set in July 2005.

Since 2015 she is a professional padel player where she has attained a world No. 1 ranking as of 2019.^[1]

Marrero turned professional in 1998. At the 2000 French Open, she reached the quarterfinals as a qualifier. In the second round, Marrero defeated Dominique Van Roost, who defeated No. 2 seed Lindsay Davenport in the first round. Reaching the fourth round, she defeated Paraguay's Rossana de los Ríos in three sets. It was the first time in French Open history that two qualifiers met in the fourth round. In the quarterfinals, Marrero was defeated by eventual runner-up, Conchita Martínez, 7–6, 6–1. At the 2001 French Open, she lost in the third round to Kim Clijsters, who finished runner-up.

2004 saw Marrero win first WTA Tour doubles title in Sopot, Poland. In the final, she and Nuria Llagostera Vives defeated Klaudia Jans and Alicja Rosolska. In 2005, Marrero won her second (and last) doubles title. Partnering Antonella Serra Zanetti, the team, which was seeded fourth, defeated Daniela and Sandra Klemenschits in the final.

At the 2007 US Open, Marrero competed in the doubles competition with Selima Sfar. In the first round they defeated Roberta Vinci and former world-number-one doubles player Paola Suárez, in three sets. They lost in the second round, however, to Alicia Molik and Mara Santangelo, who were the 2007 French Open doubles champions.

Marrero announced her retirement from tennis in 2010, after struggling with injuries.^[2]

Result	W/L	Date	Tournament	Surface	Partner	Opponents	Score
Loss	0–1	Aug 2001	Basel, Switzerland	Clay (i)	Joannette Kruger	Anabel Medina Garrigues María José Martínez Sánchez	6–7(5–7), 2–6
Win	1–1	Aug 2004	Sopot, Poland	Clay	Nuria Llagostera Vives	Klaudia Jans Alicja Rosolska	6–4, 6–3
Loss	1–2	Oct 2004	Hasselt, Belgium	Hard (i)	Nuria Llagostera Vives	Mara Santangelo Jennifer Russell	3–6, 5–7
Win	2–2	May 2005	İstanbul, Turkey	Clay	Antonella Serra Zanetti	Daniela Klemenschits Sandra Klemenschits	6–4, 6–0
Loss	2–3	Aug 2005	Budapest, Hungary	Clay	Lourdes Domínguez Lino	Émilie Loit Katarina Srebotnik	1–6, 6–3, 2–6

Result	No.	Date	Tournament	Surface	Opponent	Score
Win	1.	13 September 1998	Póvoa de Varzim, Portugal	Hard	Wendy Fix	6–0, 6–0
Loss	1.	5 October 1998	Girona, Spain	Clay	Ángeles Montolio	4–6, 1–6
Loss	2.	19 April 1999	Gelos, France	Clay	Stephanie Devillé	6–3, 1–6, 5–7
Loss	3.	11 July 1999	Darmstadt, Germany	Clay	Petra Mandula	6–1, 5–7, 1–6
Win	2.	18 July 1999	Getxo, Spain	Clay	Lourdes Domínguez Lino	6–2, 6–7, 6–4
Win	3.	19 September 1999	Otočec, Slovenia	Clay	Angelika Rösch	6–2, 6–1
Win	4.	26 September 1999	Sofia, Bulgaria	Clay	Lubomira Bacheva	6–2, 6–3
Win	5.	26 March 2000	Taranto, Italy	Clay	Gloria Pizzichini	6–4, 6–4
Win	6.	23 April 2000	Gelos, France	Clay	Anabel Medina Garrigues	2–6, 7–5, 7–5
Win	7.	16 November 2003	Le Havre, France	Clay (i)	Aurélie Védy	6–3, 6–3
Loss	4.	1 December 2003	Palm Beach Gardens, US	Clay	Lindsay Lee-Waters	3–6, 3–6
Win	8.	10 October 2004	Girona	Clay	Dally Randriantefy	3–6, 7–6, 6–0
Loss	5.	19 January 2007	Algiers, Algeria	Clay	Michelle Gerards	7–5, 0–6, 3–6
Loss	6.	13 May 2007	Rome, Italy	Clay	Caroline Maes	4–6, 6–7
Loss	7.	22 September 2007	Lecce, Italy	Clay	Alisa Kleybanova	1–6, 0–6
Loss	8.	8 October 2007	Reggio Calabria, Italy	Clay	Sandra Martinović	6–4, 5–7, 4–6
Loss	9.	26 April 2009	Torrent, Spain	Clay	Lara Arruabarrena	2–6, 3–6
Win	9.	4 May 2009	Badalona, Spain	Clay	Yevgeniya Kryvoruchko	6–1, 6–2

Result	No.	Date	Tournament	Surface	Partner	Opponents	Score
Win	1.	13 September 1998	ITF Póvoa de Varzim, Portugal	Hard	Aleksandra Srndovic	Ana Gaspar Frederica Piedade	6–1, 6–0
Loss	1.	11 October 1998	ITF Girona, Spain	Clay	María José Martínez Sánchez	Rosa María Andrés Rodríguez Lourdes Domínguez Lino	6–4, 1–6, 6–7
Win	2.	17 April 2000	ITF Gelos, France	Clay	Eva Bes	Lourdes Domínguez Lino Anabel Medina Garrigues	6–3, 6–4
Loss	2.	28 April 2007	ITF Torrent, Spain	Clay	Carla Suárez Navarro	Ekaterina Lopes Evgeniya Rodina	6–7(7), 6–3, 2–6
Loss	3.	18 April 2007	ITF Gran Canaria, Spain	Clay	Carla Suárez Navarro	Anne Keothavong Frederica Piedade	w/o
Win	3.	24 September 2007	ITF Granada, Spain	Clay	María José Martínez Sánchez	Alexandra Dulgheru Monica Niculescu	6–4, 6–1
Win	4.	8 October 2007	ITF Reggio Calabria, Italy	Clay	María José Martínez Sánchez	Stefanie Haidner Sandra Martinović	6–1, 6–2
Loss	4.	3 February 2008	ITF Belford, France	Hard (i)	María José Martínez Sánchez	Lucie Hradecká Andrea Hlaváčková	6–7(8), 4–6
Win	5.	15 March 2008	ITF Las Palmas, Spain	Hard	María José Martínez Sánchez	Anna Gerasimou Anna Hawkins	6–2, 7–6(1)

• Marta Marrero at the Women's Tennis Association
• Marta Marrero at the International Tennis Federation
• Marta Marrero at the Billie Jean King Cup (archived)