Unlike the other top-ranked women players, Martinez, who was 22 last month, could probably walk unrecognised through a shopping centre.
There are five ways to determine the top-ranked woman in the game, and two of them come up with the same person.
Graf is the world's top-ranked woman, with a 32-1 record in tournaments this year.
Meyers is one of the world's top-ranked women players and has won many international titles.
Gail Greenberg of Manhattan, one of the world's top-ranked women players, played three no-trump as shown and received a heart lead.
She is the top-ranked American woman in her weight class and she won the silver medal at the 2003 world championships.
She was also the world's top-ranked woman in early 2009.
The eight top-ranked women in the world will compete in each of 14 weight classes in Seoul.
Earlier, in the women's competition, Shannon Bahrke, the top-ranked woman among the world's moguls skiers, finished 12th.
In 1982, she became the top-ranked woman on the longboard.
