| Date: | March 2–16 |
| Edition: | 18th |
| Prize Money: | $750,000 |
| Surface: | Hard / outdoor |
| Location: | Indian Wells, California, US |
| Champms: |  Jim Courier[1] |
| Champws: | Martina Navratilova |
| Champmd: | Jim Courier /  Javier Sánchez[2] |
| Champwd: | See Women's doubles note |
The 1991 Newsweek Champions Cup and the Virginia Slims of Palm Springs were tennis tournaments played on outdoor hard courts. It was the 18th edition of the tournament, and was part of the ATP Super 9 of the 1991 ATP Tour, and of the Tier II Series of the 1991 WTA Tour. It was held from March 2 through March 16, 1991.
In the men's tournament, Jim Courier won both the singles and doubles tournaments, partnering Javier Sánchez in the latter. This is the first time ever that a male player achieved both titles at the same year.[3]
See main article: 1991 Newsweek Champions Cup – Singles. Jim Courier defeated 
Guy Forget, 4–6, 6–3, 4–6, 6–3, 7–6(7–4)
See main article: 1991 Virginia Slims of Palm Springs – Singles. Martina Navratilova defeated Monica Seles 6–2, 7–6(8–6)
See main article: 1991 Newsweek Champions Cup – Doubles. Jim Courier / Javier Sánchez defeated Guy Forget / Henri Leconte 7–6, 3–6, 6–3
See main article: 1991 Virginia Slims of Palm Springs – Doubles. The women's doubles final was not played due to rain.