The 1991 Lipton International Players Championships was a tennis tournament played on outdoor hard courts. It was the 7th edition of the Miami tournament, and was part of the ATP Super 9 of the 1991 ATP Tour, and of the Tier I Series of the 1991 WTA Tour. Both the men's and the women's events took place at the Tennis Center at Crandon Park in Key Biscayne, Florida in the United States, from March 11 through March 25, 1991.
| 1991 Lipton International Players Championships | |
|---|---|
| Date | March 11–25 |
| Edition | 7th |
| Surface | Hard / outdoor |
| Location | Key Biscayne, Florida, U.S. |
| Venue | Tennis Center at Crandon Park |
| Champions | |
| Men's singles | |
 Jim Courier | |
| Women's singles | |
 Monica Seles | |
| Men's doubles | |
 Wayne Ferreira / Piet Norval | |
| Women's doubles | |
| Mary Joe Fernández / Zina Garrison Jackson | |
Finals edit
Men's singles edit
Jim Courier defeated David Wheaton 4–6, 6–3, 6–4
- It was Jim Courier's 2nd title of the year and his 3rd overall. It was his 2nd Masters title of the year and overall.
Women's singles edit
Monica Seles defeated 
Gabriela Sabatini 6–3, 7–5
- It was Aranxta Sánchez Vicario's 1st title of the year and her 7th overall. It was her 1st career Tier I title.
Men's doubles edit
Wayne Ferreira / Piet Norval defeated Ken Flach / Robert Seguso 5–7, 7–6, 6–2
Women's doubles edit
Mary Joe Fernández / Zina Garrison Jackson defeated Gigi Fernández / 
Jana Novotná 7–5, 6–2