- Born
- 1964-02-09 in Buenos Aires, Argentina, Argentina
- Hand
- Right
- Backhand
- nan
- Height
- 183 cm
- Weight
- 77 kg
- Coach
- nan
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Guillermo Rivas
Guillermo RivasGuillermo Rivas has found the Tour difficult, recording 10–27 across 37 matches (27.0%). The numbers point to a player still building their Tour presence — a key area of opportunity going forward.
Best season: 1989 — 6–8 (42.9%) from 14 matches. The best single-season display to date — a useful reference point as the career continues to develop.
| Date | Tournament | Srf | Rd | Wrk | Winner | Lrk | Loser | Score |
|---|---|---|---|---|---|---|---|---|
| 1990-02-05 | Guaruja | Hard | R32 | 130 | 219 | 6-2 6-3 | ||
| 1989-08-21 | San Marino | Clay | R32 | 326 | 217 | 7-6 6-4 | ||
| 1989-08-14 | St. Vincent | Clay | R16 | 178 | 220 | 6-1 6-1 | ||
| 1989-08-14 | St. Vincent | Clay | R32 | 220 | 265 | 6-3 7-6 | ||
| 1989-08-07 | Prague | Clay | R16 | 67 | 196 | 6-1 6-1 | ||
| 1989-08-07 | Prague | Clay | R32 | 196 | 1075 | 6-4 7-6 | ||
| 1989-07-31 | Bastad | Clay | R32 | 202 | 189 | 6-3 6-7 6-2 | ||
| 1989-07-10 | Boston | Clay | R32 | 169 | 196 | 7-5 6-3 | ||
| 1989-07-10 | Boston | Clay | R64 | 196 | 272 | 6-4 6-2 | ||
| 1989-05-08 | Charleston | Clay | R32 | 34 | 158 | 6-3 7-5 |
