Marrero began at the age of seven years with the sport of tennis. Your preferred surface is the clay court. From 1997, she played on ITF tournaments.
In her tennis career, she won two WTA doubles titles. In 2000, she reached the quarterfinals of the singles French Open, a year later she was in the second round of the Australian Open. Your best world ranking in singles and doubles was ranked 47th in each
Between 2002 and 2005 she had seven operations for the Spanish Fed Cup team. They won two games and suffered five defeats.