| 1980 Mutual Benefit Life Open | |
|---|---|
| Date | July 28 – August 4 |
| Edition | 11th |
| Category | Grand Prix |
| Draw | 32S / 16D |
| Prize money | $75,000 |
| Surface | Clay / outdoor |
| Location | South Orange, New Jersey, US |
| Venue | Orange Lawn Tennis Club |
| Champions | |
| Singles | |
 José Luis Clerc[1] | |
| Doubles | |
 Bill Maze /John McEnroe[2] | |
The1980 Mutual Benefit Life Open, also known as the South Orange Open, was a men'stennis tournament played on outdoorclay courts at the Orange Lawn Tennis Club inSouth Orange, New Jersey in the United States. The event was part of the1980 Grand Prix circuit. It was the 11th edition of the tournament and was held from July 28 through August 4, 1980. Second-seededJosé Luis Clerc won the singles title and earned $15,000 first-prize money.[3]
José Luis Clerc defeatedJohn McEnroe 6–3, 6–2
Bill Maze /John McEnroe defeatedFritz Buehning /Van Winitsky 7–6, 6–4