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$15.76 million hard-court tournament
At Flushing, N.Y.
Monday's results

Men's singles -- fourth round
Andre Agassi (2), United States, def. Roger Federer (13), Switzerland, 6-1, 6-2, 6-4.

Pete Sampras (10), United States, def. Patrick Rafter (6), Australia, 6-3, 6-2, 6-7 (5), 6-4.

Mariano Zabaleta, Argentina, def. Xavier Malisse, Belgium, 6-4, 7-6 (4), 7-5.

Marat Safin (3), Russia, def. Thomas Johansson (14), Sweden, 6-2, 2-6, 6-4, 7-6 (3).

Men's doubles -- quarterfinals
Donald Johnson and Jared Palmer (2), United States, def. John-Laffnie de Jager and Robbie Koenig, South Africa, 6-2, 3-6, 6-1.

Max Mirnyi, Belarus, and Sandon Stolle (4), Australia, def. Massimo Bertolini, Italy, and Devin Bowen, United States, 7-6 (3), 6-4.

Women's singles -- fourth round
Jennifer Capriati (2), United States, def. Barbara Schett (19), Austria, 6-3, 6-3.

Kim Clijsters (5), Belgium, def. Elena Dementieva (11), Russia, 7-5, 4-6, 6-2.

Amelie Mauresmo (8), France, def. Nathalie Tauziat (9), France, 6-0, 6-7 (1), 6-3.

Venus Williams (4), United States, def. Sandrine Testud (18), France, 6-4, 6-0.

Women's doubles -- third round
Tina Krizan and Katarina Srebotnik (10), Slovenia, def. Daja Bedanova, Czech Republic, and Maria Emilia Salerni, Argentina, 6-3, 6-0.

Cara Black, Zimbabwe, and Elena Likhovtseva (3), Russia, def. Evie Dominikovic, Australia, and Marissa Irvin, United States, 7-6 (2), 6-3.

Jennifer Capriati, United States, and Martina Hingis, Switzerland, def. Kveta Hrdlickova, Czech Republic, and Barbara Rittner, Germany, 6-1, 6-2.

Mixed Doubles
Quarterfinals
Lisa Raymond, United States, and Leander Paes (2), India, def. Elena Tatarkova, Ukraine, and Mark Knowles, Bahamas, 6-2, 6-3.

Kimberly Po-Messerli and Donald Johnson (3), United States, def. Cara and Wayne Black, Zimbabwe, 6-3, 6-4.

Rennae Stubbs and Todd Woodbridge (1), Australia, def. Anne-Gaelle Sidot, France, and Sandon Stolle (7), Australia, 6-4, 7-6 (1).

Ai Sugiyama, Japan, and Ellis Ferreira (5), South Africa, def. Arantxa Sanchez-Vicario, Spain, and Jared Palmer (4), United States, 7-5, 7-6 (8).