María José Martínez Sánchez (born 12 August 1982) is a Spanish professional tennis player. In singles, she has won five WTA singles titles, the 2009 Copa Sony Ericsson Colsanitas, the 2009 Swedish Open, the Premier 5 event, 2010 Internazionali BNL d'Italia, the 2011 Gastein Ladies and the 2011 Hansol Korea Open. She was also a runner-up at the 2008 Barcelona KIA. As a junior she won the 1999 Orange Bowl, a year-ending tennis event for junior players. She reached her career high ranking in singles of World No. 19 on 10 May 2010.