| Date | ATP Tour / Davis Cup | Challengers |
| 12/31/1990 | Wellington $150K Adelaide $150K | |
| 1/7/1991 | ||
| 1/14/1991 | Australian Open $2,023K | |
| 1/21/1991 | Vina Del Mar $25K Heilbronn $50K | |
| 1/28/1991 | Benin City $50K Bangalore $25K | |
| 2/4/1991 | Guaruja $125K San Francisco $225K Milan $540K | |
| 2/11/1991 | Brussels $465K Philadelphia $825K | Sao Paulo $25K |
| 2/18/1991 | Stuttgart Indoor $825K Memphis $600K | Americana $25K |
| 2/25/1991 | Guadeloupe $75K Indian Wells $50K | |
| 3/4/1991 | Indian Wells $750K Copenhagen $125K | |
| 3/11/1991 | Key Biscayne $1,200K | Santiago $25K |
| 3/18/1991 | ||
| 3/25/1991 | San Luis Potosi $100K Marseille $50K | |
| 4/1/1991 | Zaragoza $50K | |
| 4/8/1991 | Parioli $50K | |
| 4/15/1991 | Oporto $100K Mexico City $100K | |
| 4/22/1991 | Monte Carlo $750K Singapore $215K | Nagoya $50K Lisbon $100K Birmingham $50K |
| 4/29/1991 | Sao Paulo $25K Kuala Lumpur $50K Prague $25K | |
| 5/6/1991 | ||
| 5/13/1991 | ||
| 5/20/1991 | Bologna $225K | Bielefeld $50K |
| 5/27/1991 | French Open $3,481K | |
| 6/3/1991 | ||
| 6/10/1991 | Rosmalen $225K Queen's Club $450K Florence $225K | |
| 6/17/1991 | Manchester $225K Genova $225K | |
| 6/24/1991 | Wimbledon $3,460K | |
| 7/1/1991 | ||
| 7/8/1991 | Neu Ulm $50K | |
| 7/15/1991 | Stuttgart Outdoor $825K Washington $465K | |
| 7/22/1991 | Canadian Open $930K Hilversum $215K | |
| 7/29/1991 | San Marino $250K Kitzbuhel $337K Los Angeles $225K | |
| 8/5/1991 | Cincinnati $1,020K Prague $305K | |
| 8/12/1991 | New Haven $825K Indianapolis $825K | Pescara $50K |
| 8/19/1991 | Schenectady $125K Long Island $225K | |
| 8/26/1991 | U.S. Open $3,099K | Merano $50K |
| 9/2/1991 | ||
| 9/9/1991 | Azores $100K | |
| 9/16/1991 | ||
| 9/23/1991 | Cali $50K Bloomfield $50K | |
| 9/30/1991 | Toulouse $260K Sydney Indoor $750K Athens $125K | Siracusa $75K Jerusalem $50K Ponte Vedra $50K |
| 10/7/1991 | Tokyo Indoor $750K | Reggio di Calabria $50K Cherbourg $50K Casablanca $50K Pembroke Pines $75K |
| 10/14/1991 | ||
| 10/21/1991 | Brest $100K | |
| 10/28/1991 | Paris Indoor $1,650K Buzios $147K | Aachen $50K |
| 11/4/1991 | Sao Paulo $225K Moscow $297K Birmingham $450K | |
| 11/11/1991 | ATP Tour World Championship $2,225K | Sao Paulo $50K Christchurch $25K |
| 11/18/1991 | ||
| 11/25/1991 | Puebla $50K Johannesburg $100K Bossonnens $100K | |
| 12/2/1991 | ||
| 12/9/1991 | Hong Kong $25K | |
| 12/16/1991 | Guam $25K | |
| 12/23/1991 |