With 35-mph winds making for chaotic tennis, Steffi Graf and Arantxa Sanchez Vicario won in straight sets Thursday to advance to the quarterfinals of the Virginia Slims of Florida.
4 seed, Amanda Coetzer, was not as fortunate. Chanda Rubin, making the most of a bullet serve, beat her 3-6, 6-2, 7-5 in the biggest upset of the tournament.
In the only singles match at night, No. 3 Gabriela Sabatini of Argentina defeated amateur qualifier Sonya Jeyaseelan of Canada 6-2, 6-2.
Graf, the top seed, continued her rampage with a 6-2, 6-4 victory over Elena Likhovtseva.
Graf has won the three tournaments she has entered this year and has yet to lose a set in her 19 matches. Dating to last year, Graf has won 68 of 69 matches.
"It's not fun to be out there with the wind," Graf said. "It's impossible to play good tennis because you can't control the balls. I didn't like it much, to say the least."
Graf was able to control play when it counted, converting five of six breakpoint opportunities.
"The wind can be an equalizer," she said. "In this weather, anything can happen. You've got to watch out."
Graf, the world's No. 1 player, will play Sabine Hack, the seventh seed, today.
Sanchez Vicario, the second seed, defeated No. 12 Julie Halard 6-1, 6-1 in 43 minutes. Sanchez Vicario will play No. 16 Stephanie Rottier, who upset No. 6 Judith Wiesner 1-6, 6-2, 6-4.