Martin Hingis needed just 56 minutes for victory
Martin Hingis continued her return to form with a 6-2 6-0 demolition of Alexandra Stevenson in the Nasdaq-100 Open Masters.
The Swiss player needed just 56 minutes to dispose of the American and move into the quarter-finals.
And fourth seed Kim Clijsters bounced back from injury to win through in straight sets.
Clijsters, this year's Australian Open semi-finalist, made light work of Zimbabwe's Cara Black, taking 75 minutes to triumph 6-4 6-2 on Monday.
Clijsters had missed much of the last six weeks because of a damaged arm but looked untroubled by the injury against Black, currently 75th in the WTA rankings.
The result went some way to make up for the Belgian's first-round exit against France's Nathalie Dechy in Indian Wells last week.
She now faces either fellow Australian Open semi-finalist Monica Seles or Italian Silvia Farina Elia in the next round.
Monday's women's results:
Kim Clijsters (4), Belgium, def. Cara Black, Zimbabwe,
6-4, 6-2.
Martina Hingis (3), Switzerland, def. Alexandra Stevenson
(23), United States, 6-2, 6-0.
Elena Dementieva (12), Russia, def. Anne Kremer (26),
Luxembourg, 1-6, 7-5, 7-6 (14).
Venus Williams (2), United States, def. Amanda Coetzer
(14), South Africa, 6-2, 6-0.
Monica Seles (5), United States, def. Silvia Farina Elia
(9), Italy, 7-6 (4), 6-4.
Serena Williams (8), United States, def. Marissa Irvin,
United States, 6-1, 6-4.
Tatiana Panova (28), Russia, def. Arantxa Sanchez-Vicario
(11), Spain, 6-1, 7-6 (8).
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