Basilea 1991 • ATP 500 — Cuadro
23 — 29 septiembre
- Swedenx7
- Francex4
- Germanyx4
- USAx4
- Switzerlandx3
- Czech Republicx2
- Spainx2
- Italyx2
- Russiax2
- Israelx1
- Netherlandsx1
- USAx4
- Swedenx3
- Czech Republicx2
- Spainx2
- Germanyx1
- Israelx1
- Italyx1
- Russiax1
- Switzerlandx1
- USAx3
- Czech Republicx1
- Israelx1
- Russiax1
- Switzerlandx1
- Swedenx1
- USAx2
- Russiax1
- Switzerlandx1