Events
| Tournament | Also currently known as | City(s) | Country | Court surface | Tier I from | Years |
| Miami | Sony Ericsson Open | Miami | United States | Hard | 1988–2008 | 21 |
| Berlin | Qatar Total German Open | Berlin1 | Germany1 | Red Clay | 1988–2008 | 21 |
| Canada | Rogers Cup presented by A. E. | Montreal and Toronto | Canada | Hard | 1990–2008 | 19 |
| Charleston | Family Circle Cup | Hilton Head and Charleston | United States | Green Clay | 1990–2008 | 19 |
| Rome | Telecom Italia Masters | Rome | Italy | Red Clay | 1990–2008 | 19 |
| Tokyo | Toray Pan Pacific Open | Yokohama and Tokyo | Japan | Hard | 1993–2008 | 16 |
| Zürich | Zürich Open | Zürich | Switzerland | Hard (I) | 1993–2007 | 15 |
| Indian Wells | Pacific Life Open | Indian Wells | United States | Hard | 1996–2008 | 13 |
| Moscow | Kremlin Cup | Moscow | Russia | Supreme (I) | 1997–2008 | 12 |
| San Diego | Acura Classic | San Diego | United States | Hard | 2003–2007 | 5 |
| Philadelphia | Advanta Championships Philadelphia | Philadelphia | United States | Carpet (I) | 1993–1995 | 3 |
| Boca Raton | VS of Florida | Boca Raton | United States | Hard | 1991–1992 | 2 |
| Chicago | Ameritech Cup Chicago | Chicago | United States | Carpet (I) | 1990 | 1 |
| Doha | Qatar Total Open | Doha | Qatar | Hard | 2008 | 1 |
- 1 - Until German reunification, in 1990, tournament was held in West Berlin, in West Germany.
Read more about this topic: WTA Tier I Tournaments
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—David Hume (17111776)
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—Francis Bacon (15611626)