H2H data updated: 2026-09-07 00:00 UTC
Guillermo Rivas holds a 1–0 lead over Claudio Mezzadri in their ATP head-to-head. Across 1 main-draw meeting, Guillermo Rivas leads 1–0 on clay. Most recently, Guillermo Rivas won the 1985 Austrian Open Kitzbühel round of 64 6-4 2-6 6-4.
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| Player | Score | Player | Match Data | Date | Round | Tournament | Category | Surface |
|---|---|---|---|---|---|---|---|---|
| Guillermo Rivas | 6-4 2-6 6-4 | Claudio Mezzadri | Match data | Aug 7, 1985* | R64 | Austrian Open Kitzbühel | ATP 250 | Clay |
Estimated match date where the exact historical date is unavailable. Arrows show an edition's recorded category and documented modern equivalent; unresolved editions keep their recorded category. Asterisked totals include editions mapped from documented historical predecessor categories. Mapping details.
| Player | Current | Peak | Pts | Elo | W | L | Win % | GS | 1000 including documented historical predecessor categories | Finals | 500 including documented historical predecessor categories | 250 including documented historical predecessor categories | Titles |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Claudio Mezzadri | #1,238 | #26 | 539 | 1,801 | 105 | 131 | 44.5% | 0 | 0 | 0 | 0 | 1 | 1 |
| Guillermo Rivas | #783 | #116 | 105 | 1,507 | 10 | 27 | 27.0% | 0 | 0 | 0 | 0 | 0 | 0 |
Seasons are aligned by the age each player spent most of that calendar year. GS and Titles are cumulative career totals through that season.
| Age | Claudio Mezzadri | Guillermo Rivas | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | W-L | Win % | Rank | Elo | GS | Titles | Yr | W-L | Win % | Rank | Elo | GS | Titles | |
| 18 | 1983 | 1–3 | 25.0% | #831 | 1,482 | 0 | 0 | — | — | — | — | — | — | — |
| 19 | 1984 | 7–11 | 38.9% | #151 | 1,515 | 0 | 0 | — | — | — | — | — | — | — |
| 20 | 1985 | 5–8 | 38.5% | #135 | 1,520 | 0 | 0 | 1984 | 1–4 | 20.0% | #156 | 1,462 | 0 | 0 |
| 21 | 1986 | 12–16 | 42.9% | #138 | 1,587 | 0 | 0 | 1985 | 3–8 | 27.3% | #193 | 1,453 | 0 | 0 |
| 22 | 1987 | 25–16 | 61.0% | #28 | 1,772 | 0 | 1 | 1986 | 0–3 | 0.0% | #279 | 1,426 | 0 | 0 |
| 23 | 1988 | 13–15 | 46.4% | #105 | 1,660 | 0 | 1 | — | — | — | — | — | — | — |
| 24 | 1989 | 10–14 | 41.7% | #230 | 1,581 | 0 | 1 | 1988 | 0–3 | 0.0% | #185 | 1,412 | 0 | 0 |
| 25 | 1990 | 2–3 | 40.0% | #305 | 1,585 | 0 | 1 | 1989 | 6–8 | 42.9% | #251 | 1,447 | 0 | 0 |
| 26 | 1991 | 5–7 | 41.7% | #127 | 1,590 | 0 | 1 | 1990 | 0–1 | 0.0% | #714 | 1,439 | 0 | 0 |
| 27 | 1992 | 13–16 | 44.8% | #97 | 1,596 | 0 | 1 | — | — | — | — | — | — | — |
| 28 | 1993 | 12–22 | 35.3% | #134 | 1,518 | 0 | 1 | — | — | — | — | — | — | — |
Seasons are aligned by the age each player spent most of that calendar year. Results cover completed main-draw matches. Bold green marks the higher win percentage when both players have at least 5 matches on that surface at the aligned age.
| Age | Claudio Mezzadri | Guillermo Rivas | ||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | Hard | Clay | Grass | Carpet | Yr | Hard | Clay | Grass | Carpet | |||||||||||||||||||||||||
| W | L | M | Win % | W | L | M | Win % | W | L | M | Win % | W | L | M | Win % | W | L | M | Win % | W | L | M | Win % | W | L | M | Win % | W | L | M | Win % | |||
| 18 | 1983 | 1 | 1 | 2 | 50.0% | 0 | 2 | 2 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 19 | 1984 | 0 | 1 | 1 | 0.0% | 7 | 9 | 16 | 43.8% | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 20 | 1985 | — | — | — | — | 5 | 8 | 13 | 38.5% | — | — | — | — | — | — | — | — | 1984 | 1 | 1 | 2 | 50.0% | 0 | 3 | 3 | 0.0% | — | — | — | — | — | — | — | — |
| 21 | 1986 | 1 | 3 | 4 | 25.0% | 10 | 12 | 22 | 45.5% | 1 | 1 | 2 | 50.0% | — | — | — | — | 1985 | 0 | 1 | 1 | 0.0% | 3 | 7 | 10 | 30.0% | — | — | — | — | — | — | — | — |
| 22 | 1987 | 6 | 4 | 10 | 60.0% | 17 | 8 | 25 | 68.0% | — | — | — | — | 2 | 4 | 6 | 33.3% | 1986 | — | — | — | — | 0 | 3 | 3 | 0.0% | — | — | — | — | — | — | — | — |
| 23 | 1988 | 2 | 4 | 6 | 33.3% | 9 | 9 | 18 | 50.0% | — | — | — | — | 2 | 2 | 4 | 50.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 24 | 1989 | 2 | 3 | 5 | 40.0% | 7 | 9 | 16 | 43.8% | — | — | — | — | 1 | 2 | 3 | 33.3% | 1988 | 0 | 1 | 1 | 0.0% | 0 | 2 | 2 | 0.0% | — | — | — | — | — | — | — | — |
| 25 | 1990 | — | — | — | — | 2 | 3 | 5 | 40.0% | — | — | — | — | — | — | — | — | 1989 | — | — | — | — | 4 | 7 | 11 | 36.4% | — | — | — | — | 2 | 1 | 3 | 66.7% |
| 26 | 1991 | 0 | 1 | 1 | 0.0% | 5 | 5 | 10 | 50.0% | — | — | — | — | 0 | 1 | 1 | 0.0% | 1990 | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — |
| 27 | 1992 | 2 | 2 | 4 | 50.0% | 10 | 11 | 21 | 47.6% | 0 | 1 | 1 | 0.0% | 1 | 2 | 3 | 33.3% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 28 | 1993 | 3 | 7 | 10 | 30.0% | 9 | 13 | 22 | 40.9% | — | — | — | — | 0 | 2 | 2 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Career | — | 17 | 26 | 43 | 39.5% | 81 | 89 | 170 | 47.6% | 1 | 3 | 4 | 25.0% | 6 | 13 | 19 | 31.6% | — | 1 | 4 | 5 | 20.0% | 7 | 22 | 29 | 24.1% | — | — | — | — | 2 | 1 | 3 | 66.7% |
Seasons are aligned by the age each player spent most of that calendar year. Metrics use eligible main-draw results; point statistics use matches with detailed data. Bold green marks the stronger value when both underlying samples are sufficient. Lower is better for Schedule because a negative value means a tougher schedule. Career Schedule is normalized per 100 matches.
| Age | Claudio Mezzadri | Guillermo Rivas | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | Elo | P+ | Serve+ | Return+ | PD | TPW% | Hard Elo | Clay Elo | Grass Elo | Set Win % | Set Margin | Dec. Set | Tiebreak | Pressure+ | Schedule | Yr | Elo | P+ | Serve+ | Return+ | PD | TPW% | Hard Elo | Clay Elo | Grass Elo | Set Win % | Set Margin | Dec. Set | Tiebreak | Pressure+ | Schedule | |
| 18 | 1983 | 1482 | 97.2 | — | — | — | — | — | — | — | 30.0% | -1.60 | 1–1 | 0–1 | — | +0.56 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 19 | 1984 | 1515 | 117.4 | — | — | — | — | — | +48 | — | 44.2% | -0.44 | 2–3 (40%) | 2–1 (67%) | 101.1 | +1.04 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 20 | 1985 | 1521 | 116.6 | — | — | — | — | — | +25 | — | 40.0% | -1.03 | 2–2 (50%) | 2–1 (67%) | — | +0.64 | 1984 | 1463 | 100.3 | — | — | — | — | — | +34 | — | 30.8% | -0.69 | 1–2 (33%) | 0–3 (0%) | 95.7 | +0.77 |
| 21 | 1986 | 1587 | 129.9 | — | — | — | — | -71 | +21 | — | 47.1% | -0.04 | 2–6 (25%) | 2–3 (40%) | 96.0 | +0.87 | 1985 | 1454 | 100.1 | — | — | — | — | — | +11 | — | 30.8% | -1.81 | 2–2 (50%) | 1–1 | — | +0.44 |
| 22 | 1987 | 1773 | 147.0 | — | — | — | — | -147 | +24 | — | 59.6% | +0.78 | 9–6 (60%) | 10–5 (67%) | 108.3 | -0.33 | 1986 | 1426 | 99.9 | — | — | — | — | — | +27 | — | 14.3% | -2.57 | 0–1 | 0–1 | — | +0.12 |
| 23 | 1988 | 1661 | 126.8 | — | — | — | — | -73 | +75 | — | 44.9% | -0.16 | 5–2 (71%) | 2–4 (33%) | 102.3 | -0.30 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 24 | 1989 | 1581 | 122.3 | — | — | — | — | -12 | +75 | — | 46.6% | -0.19 | 1–5 (17%) | 5–2 (71%) | 97.5 | +1.51 | 1988 | 1412 | 113.9 | — | — | — | — | — | — | — | 25.0% | -1.50 | 0–2 | 1–0 | — | -0.24 |
| 25 | 1990 | 1585 | 114.2 | — | — | — | — | — | +81 | — | 45.5% | -0.09 | 2–1 (67%) | 0–3 (0%) | 99.1 | -0.20 | 1989 | 1448 | 100.7 | — | — | — | — | +79 | -16 | — | 45.2% | -0.61 | 1–2 (33%) | 4–1 (80%) | 102.3 | +1.52 |
| 26 | 1991 | 1590 | 126.5 | -1.74 | +1.94 | 0.981 | 49.4% | — | +105 | — | 50.0% | -0.43 | 0–4 (0%) | 3–1 (75%) | 98.0 | +0.10 | 1990 | 1439 | 97.6 | — | — | — | — | — | — | — | 0.0% | -3.50 | — | — | — | +0.02 |
| 27 | 1992 | 1596 | 123.3 | +0.13 | -1.64 | 0.931 | 48.8% | -27 | +52 | — | 45.5% | -0.26 | 7–8 (47%) | 4–5 (44%) | 97.7 | +0.10 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 28 | 1993 | 1519 | 120.8 | -1.90 | -1.17 | 0.947 | 48.7% | -25 | +105 | — | 38.5% | -0.68 | 5–6 (45%) | 4–6 (40%) | 98.5 | +1.06 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Career | — | 1801 | 134.2 | -1.11 | -0.88 | 0.947 | 48.8% | -69 | +57 | — | 46.7% | -0.18 | 36–44 (45%) | 34–32 (52%) | 99.6 | +2.16 | — | 1507 | 103.1 | — | — | — | — | +79 | +4 | — | 33.3% | -1.29 | 4–9 (31%) | 6–6 (50%) | 97.1 | +7.11 |
Each player's five most-played main-draw opponents. The current matchup is highlighted when it appears in a player's top five.
| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| Guy Forget | 1 | 7 | 8 | Mar 3, 1989 | H2H |
| Horacio de la Pena | 1 | 4 | 5 | Jun 10, 1993 | H2H |
| Roland Stadler | 4 | 1 | 5 | Jul 13, 1989 | H2H |
| Jan Gunnarsson | 1 | 3 | 4 | Feb 7, 1991 | H2H |
| Eduardo Bengoechea | 1 | 3 | 4 | Aug 2, 1989 | H2H |
| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| Francisco Maciel | 0 | 2 | 2 | Jun 19, 1986 | H2H |
| Christian Miniussi | 0 | 2 | 2 | Feb 28, 1985 | H2H |
| Horacio de la Pena | 0 | 1 | 1 | Feb 8, 1990 | H2H |
| Cristiano Caratti | 0 | 1 | 1 | Aug 24, 1989 | H2H |
| Gustavo Giussani | 0 | 1 | 1 | Aug 18, 1989 | — |