2001 WTA Tier I Series Singles Singles

| Tournament | Surface | Week | Winners | Finalists | Semifinalists |
|---|---|---|---|---|---|
| Tokyo | Carpet (i) | January 29 | Lindsay Davenport 6–7(4), 6–4, 6–2 | Martina Hingis | Magdalena Maleeva Anna Kournikova |
| Indian Wells | Hard | March 5 | Serena Williams 4–6, 6–4, 6–2 | Kim Clijsters | Martina Hingis Venus Williams |
| Miami | Hard | March 19 | Venus Williams 4–6, 6–1, 7–6(4) | Jennifer Capriati | Martina Hingis Elena Dementieva |
| Charleston | Clay | April 16 | Jennifer Capriati 6–0, 4–6, 6–4 | Martina Hingis | Conchita Martínez Marlene Weingärtner |
| Berlin | Clay | May 7 | Amélie Mauresmo 6–4, 2–6, 6–3 | Jennifer Capriati | Martina Hingis Justine Henin |
| Rome | Clay | May 14 | Jelena Dokić 7–6(3), 6–1 | Amélie Mauresmo | Martina Hingis Conchita Martínez |