| 1991 WTA Tier I Series | |
| Duration: | March 4 – August 11 |
| Edition: | 2nd |
| Tournaments: | 6 |
| Most Tournament Titles: | Gabriela Sabatini (3) |
| Most Tournament Finals: | Gabriela Sabatini (4) |
| Previous: | 1990 |
| Next: | 1992 |
See main article: article and 1991 WTA Tour.
The WTA Tier I events are part of the elite tour for professional women's tennis organised by the WTA called the WTA Tour.[1] [2]
| Tournament | Country | Location | Surface | Date | Prize money[3] | |
|---|---|---|---|---|---|---|
| Virginia Slims of Florida | United States | Boca Raton | Hard | Mar 4 – 17 | $500,000 | |
| Lipton International Players Championships | United States | Key Biscayne | Hard | Mar 18 – 24 | $750,000 | |
| Family Circle Cup | United States | Hilton Head Island | Clay | Apr 1 – 7 | $500,000 | |
| Peugeot Italian Open | Italy | Rome | Clay | May 6 – 12 | $500,000 | |
| Lufthansa Cup | Germany | Berlin | Clay | May 13 – 19 | $500,000 | |
| Canadian Open | Canada | Toronto | Hard | Aug 5 – 11 | $500,000 |