H2H data updated: 2026-09-03 00:00 UTC
Karel Novacek and Massimo Cierro are tied 1–1 in their ATP head-to-head. Across 2 main-draw meetings, they are tied 1–1 on clay. Most recently, Massimo Cierro won the 1991 Italian Open round of 64 6-0 6-3.
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| Player | Score | Player | Match Data | Date | Round | Tournament | Category | Surface |
|---|---|---|---|---|---|---|---|---|
| Massimo Cierro | 6-0 6-3 | Karel Novacek | Match data | May 15, 1991* | R64 | Italian Open | Masters 1000 | Clay |
| Karel Novacek | 6-4 6-4 | Massimo Cierro | Match data | Aug 2, 1990* | R32 | Austrian Open Kitzbühel | ATP World Series → modern equivalent 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Karel Novacek | #1,345 | #8 | 1,754 | 1,997 | 287 | 231 | 55.4% | 0 | 1 | 0 | 0 | 12 | 13 |
| Massimo Cierro | #1,295 | #113 | 295 | 1,535 | 18 | 45 | 28.6% | 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 | Karel Novacek | Massimo Cierro | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | W-L | Win % | Rank | Elo | GS | Titles | Yr | W-L | Win % | Rank | Elo | GS | Titles | |
| 19 | 1984 | 6–6 | 50.0% | #138 | 1,553 | 0 | 0 | — | — | — | — | — | — | — |
| 20 | 1985 | 4–4 | 50.0% | #159 | 1,558 | 0 | 0 | 1984 | 0–1 | 0.0% | #211 | 1,489 | 0 | 0 |
| 21 | 1986 | 16–14 | 53.3% | #33 | 1,693 | 0 | 1 | 1985 | 2–7 | 22.2% | #192 | 1,475 | 0 | 0 |
| 22 | 1987 | 17–22 | 43.6% | #76 | 1,643 | 0 | 1 | 1986 | 0–4 | 0.0% | #196 | 1,442 | 0 | 0 |
| 23 | 1988 | 13–13 | 50.0% | #127 | 1,637 | 0 | 1 | 1987 | 3–3 | 50.0% | #183 | 1,474 | 0 | 0 |
| 24 | 1989 | 16–13 | 55.2% | #74 | 1,685 | 0 | 2 | 1988 | 1–4 | 20.0% | #202 | 1,458 | 0 | 0 |
| 25 | 1990 | 31–29 | 51.7% | #34 | 1,706 | 0 | 3 | 1989 | 6–8 | 42.9% | #171 | 1,486 | 0 | 0 |
| 26 | 1991 | 56–29 | 65.9% | #8 | 1,844 | 0 | 7 | 1990 | 2–3 | 40.0% | #208 | 1,500 | 0 | 0 |
| 27 | 1992 | 37–23 | 61.7% | #23 | 1,822 | 0 | 10 | 1991 | 3–4 | 42.9% | #126 | 1,521 | 0 | 0 |
| 28 | 1993 | 41–22 | 65.1% | #17 | 1,761 | 0 | 12 | 1992 | 1–10 | 9.1% | #220 | 1,430 | 0 | 0 |
| 29 | 1994 | 36–29 | 55.4% | #28 | 1,790 | 0 | 13 | 1993 | 0–1 | 0.0% | #526 | 1,428 | 0 | 0 |
| 30 | 1995 | 13–24 | 35.1% | #121 | 1,597 | 0 | 13 | — | — | — | — | — | — | — |
| 31 | 1996 | 1–3 | 25.0% | #409 | 1,581 | 0 | 13 | — | — | — | — | — | — | — |
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 | Karel Novacek | Massimo Cierro | ||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 % | |||
| 19 | 1984 | 0 | 2 | 2 | 0.0% | 6 | 4 | 10 | 60.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 20 | 1985 | 0 | 1 | 1 | 0.0% | 4 | 3 | 7 | 57.1% | — | — | — | — | — | — | — | — | 1984 | — | — | — | — | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — |
| 21 | 1986 | 8 | 5 | 13 | 61.5% | 7 | 7 | 14 | 50.0% | 0 | 1 | 1 | 0.0% | 1 | 1 | 2 | 50.0% | 1985 | 0 | 1 | 1 | 0.0% | 2 | 6 | 8 | 25.0% | — | — | — | — | — | — | — | — |
| 22 | 1987 | 1 | 6 | 7 | 14.3% | 14 | 11 | 25 | 56.0% | 0 | 1 | 1 | 0.0% | 2 | 4 | 6 | 33.3% | 1986 | — | — | — | — | 0 | 4 | 4 | 0.0% | — | — | — | — | — | — | — | — |
| 23 | 1988 | 0 | 1 | 1 | 0.0% | 12 | 8 | 20 | 60.0% | 1 | 1 | 2 | 50.0% | 0 | 3 | 3 | 0.0% | 1987 | — | — | — | — | 3 | 3 | 6 | 50.0% | — | — | — | — | — | — | — | — |
| 24 | 1989 | — | — | — | — | 15 | 11 | 26 | 57.7% | 1 | 1 | 2 | 50.0% | 0 | 1 | 1 | 0.0% | 1988 | — | — | — | — | 1 | 4 | 5 | 20.0% | — | — | — | — | — | — | — | — |
| 25 | 1990 | 8 | 10 | 18 | 44.4% | 18 | 11 | 29 | 62.1% | 2 | 2 | 4 | 50.0% | 3 | 6 | 9 | 33.3% | 1989 | — | — | — | — | 6 | 8 | 14 | 42.9% | — | — | — | — | — | — | — | — |
| 26 | 1991 | 9 | 5 | 14 | 64.3% | 33 | 10 | 43 | 76.7% | 3 | 1 | 4 | 75.0% | 11 | 13 | 24 | 45.8% | 1990 | — | — | — | — | 2 | 3 | 5 | 40.0% | — | — | — | — | — | — | — | — |
| 27 | 1992 | 2 | 5 | 7 | 28.6% | 27 | 10 | 37 | 73.0% | 0 | 1 | 1 | 0.0% | 8 | 7 | 15 | 53.3% | 1991 | — | — | — | — | 3 | 4 | 7 | 42.9% | — | — | — | — | — | — | — | — |
| 28 | 1993 | 10 | 2 | 12 | 83.3% | 21 | 13 | 34 | 61.8% | 0 | 1 | 1 | 0.0% | 10 | 6 | 16 | 62.5% | 1992 | 0 | 1 | 1 | 0.0% | 1 | 8 | 9 | 11.1% | 0 | 1 | 1 | 0.0% | — | — | — | — |
| 29 | 1994 | 11 | 8 | 19 | 57.9% | 18 | 13 | 31 | 58.1% | 3 | 2 | 5 | 60.0% | 4 | 6 | 10 | 40.0% | 1993 | — | — | — | — | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — |
| 30 | 1995 | 4 | 7 | 11 | 36.4% | 7 | 11 | 18 | 38.9% | 0 | 1 | 1 | 0.0% | 2 | 5 | 7 | 28.6% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 31 | 1996 | 1 | 2 | 3 | 33.3% | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Career | — | 54 | 54 | 108 | 50.0% | 182 | 113 | 295 | 61.7% | 10 | 12 | 22 | 45.5% | 41 | 52 | 93 | 44.1% | — | 0 | 2 | 2 | 0.0% | 18 | 42 | 60 | 30.0% | 0 | 1 | 1 | 0.0% | — | — | — | — |
Seasons are aligned by the age each player spent most of that calendar year. Detailed serve and return statistics available for 286/314 of Karel Novacek's and 16/19 of Massimo Cierro's main draw matches. Sample is shown as matches with detailed serve and return statistics / total main draw matches. Bold green marks the stronger value when both stat samples contain at least 5 matches; lower is better for DFs/M.
| Age | Karel Novacek | Massimo Cierro | ||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | Sample | Aces/M | DFs/M | 1st Sv% | 1st Pts% | 2nd Pts% | BP Saved% | BP Conv% | Svc Pts% | Ret Pts% | Yr | Sample | Aces/M | DFs/M | 1st Sv% | 1st Pts% | 2nd Pts% | BP Saved% | BP Conv% | Svc Pts% | Ret Pts% | |
| 26 | 1991 | 78/85 | 5.3 | 2.6 | 56.5% | 73.8% | 52.0% | 60.4% | 45.8% | 64.6% | 39.7% | — | —/— | — | — | — | — | — | — | — | — | — |
| 27 | 1992 | 57/60 | 4.7 | 1.9 | 54.9% | 72.2% | 49.8% | 62.9% | 42.5% | 62.1% | 41.6% | 1991 | 6/7 | 1.2 | 0.8 | 52.3% | 61.8% | 52.7% | 44.1% | 49.1% | 56.7% | 43.1% |
| 28 | 1993 | 54/63 | 6.6 | 2.2 | 55.4% | 75.3% | 51.7% | 58.5% | 37.1% | 64.6% | 38.9% | 1992 | 9/11 | 1.3 | 2.6 | 48.1% | 67.7% | 43.1% | 49.5% | 32.9% | 54.4% | 34.3% |
| 29 | 1994 | 59/65 | 8.2 | 2.5 | 57.7% | 74.0% | 48.7% | 61.7% | 41.0% | 63.3% | 37.2% | 1993 | 1/1 | 2.0 | 0.0 | 50.0% | 47.6% | 47.6% | 42.9% | 0.0% | 47.6% | 30.6% |
| 30 | 1995 | 35/37 | 7.4 | 1.9 | 57.7% | 71.3% | 50.2% | 60.4% | 34.5% | 62.4% | 34.5% | — | —/— | — | — | — | — | — | — | — | — | — |
| 31 | 1996 | 3/4 | 4.7 | 2.3 | 59.4% | 74.5% | 42.8% | 68.1% | 31.3% | 62.7% | 37.8% | — | —/— | — | — | — | — | — | — | — | — | — |
| Career | — | 286/518 | 6.3 | 2.3 | 56.4% | 73.5% | 50.5% | 60.9% | 41.0% | 63.6% | 38.8% | — | 16/63 | 1.3 | 1.8 | 49.8% | 64.2% | 47.0% | 47.1% | 36.9% | 54.8% | 37.4% |
Seasons are aligned by the age each player spent most of that calendar year. Metrics are precomputed from eligible main-draw results; point-stat values use the available detailed sample. 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 | Karel Novacek | Massimo Cierro | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | |
| 19 | 1984 | 1554 | 120.6 | — | — | — | — | — | +73 | — | 47.1% | +0.03 | 3–2 (60%) | 2–3 (40%) | — | +1.14 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 20 | 1985 | 1559 | 111.3 | — | — | — | — | — | +51 | — | 45.5% | -0.14 | 3–1 (75%) | 1–0 | — | +0.91 | 1984 | 1490 | 100.8 | — | — | — | — | — | — | — | 33.3% | -0.33 | 0–1 | 0–1 | — | +0.04 |
| 21 | 1986 | 1693 | 138.0 | — | — | — | — | -50 | -14 | — | 50.6% | -0.09 | 7–4 (64%) | 8–6 (57%) | — | -0.16 | 1985 | 1476 | 119.2 | — | — | — | — | — | +18 | — | 27.3% | -1.77 | 1–2 (33%) | — | — | -0.12 |
| 22 | 1987 | 1644 | 137.9 | — | — | — | — | -102 | +98 | — | 46.7% | +0.06 | 6–10 (38%) | 6–7 (46%) | — | +1.36 | 1986 | 1443 | 96.7 | — | — | — | — | — | +27 | — | 11.1% | -3.22 | 0–1 | — | — | +0.01 |
| 23 | 1988 | 1638 | 121.5 | — | — | — | — | -155 | +57 | — | 51.6% | +0.30 | 2–4 (33%) | 4–7 (36%) | — | +1.33 | 1987 | 1475 | 104.9 | — | — | — | — | — | +23 | — | 46.2% | -0.38 | 1–0 | 1–2 (33%) | — | +0.59 |
| 24 | 1989 | 1686 | 137.1 | — | — | — | — | — | +65 | — | 56.0% | +0.36 | 4–6 (40%) | 5–4 (56%) | — | +0.04 | 1988 | 1459 | 107.4 | — | — | — | — | — | +18 | — | 30.8% | -1.16 | 1–2 (33%) | — | — | +0.12 |
| 25 | 1990 | 1706 | 145.2 | — | — | — | — | -134 | +115 | -67 | 52.5% | +0.39 | 10–11 (48%) | 9–16 (36%) | — | -1.44 | 1989 | 1487 | 113.9 | — | — | — | — | — | +22 | — | 45.7% | -0.54 | 3–4 (43%) | 3–0 (100%) | — | +1.41 |
| 26 | 1991 | 1844 | 151.2 | +3.93 | +0.54 | 1.121 | 52.1% | -150 | +204 | -155 | 60.5% | +0.61 | 20–10 (67%) | 20–15 (57%) | — | -0.67 | 1990 | 1501 | 111.7 | — | — | — | — | — | +36 | — | 41.7% | -0.08 | 1–1 | 1–0 | — | +0.04 |
| 27 | 1992 | 1823 | 144.1 | +1.07 | +1.67 | 1.099 | 51.8% | -121 | +168 | — | 59.7% | +0.68 | 10–8 (56%) | 9–10 (47%) | — | +2.36 | 1991 | 1521 | 111.5 | -0.80 | +0.17 | 0.994 | 49.9% | — | +49 | — | 33.3% | -1.17 | — | 0–1 | — | +0.47 |
| 28 | 1993 | 1761 | 150.9 | +3.30 | +0.41 | 1.101 | 51.5% | +58 | +119 | — | 61.3% | +0.58 | 13–9 (59%) | 15–7 (68%) | — | +0.47 | 1992 | 1431 | 100.2 | -2.85 | -3.55 | 0.753 | 44.5% | — | +40 | — | 17.9% | -2.07 | 1–3 (25%) | 1–1 | — | +0.55 |
| 29 | 1994 | 1790 | 137.5 | +2.00 | -1.28 | 1.013 | 50.0% | -3 | +61 | -147 | 51.2% | +0.10 | 17–8 (68%) | 17–13 (57%) | — | -0.07 | 1993 | 1429 | 102.0 | -0.60 | +2.52 | 0.584 | 38.5% | — | — | — | 0.0% | -4.50 | — | — | — | -0.11 |
| 30 | 1995 | 1597 | 135.5 | +0.95 | -2.95 | 0.917 | 48.7% | +86 | +123 | — | 41.8% | -0.54 | 5–10 (33%) | 7–6 (54%) | — | -0.66 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 31 | 1996 | 1582 | 114.3 | -0.91 | +0.70 | 1.012 | 49.9% | +98 | — | — | 33.3% | -0.67 | 0–1 | 0–1 | — | -0.27 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Career | — | 1997 | 147.3 | +2.43 | -0.06 | 1.064 | 51.1% | -57 | +111 | -125 | 53.9% | +0.29 | 100–84 (54%) | 103–95 (52%) | 101.9 | +0.84 | — | 1535 | 115.1 | -1.94 | -1.78 | 0.827 | 46.1% | — | +29 | — | 32.2% | -1.27 | 8–14 (36%) | 6–5 (55%) | 98.2 | +4.76 |
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 |
|---|---|---|---|---|---|
| Francisco Clavet | 5 | 4 | 9 | Nov 11, 1993 | H2H |
| Jonas Svensson | 4 | 5 | 9 | Apr 8, 1993 | H2H |
| Alexander Volkov | 3 | 5 | 8 | Feb 15, 1996 | H2H |
| Boris Becker | 1 | 7 | 8 | May 11, 1994 | H2H |
| Andrei Chesnokov | 3 | 4 | 7 | Apr 13, 1995 | H2H |
| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| Hans Schwaier | 2 | 1 | 3 | Sep 28, 1988 | H2H |
| Jonas Svensson | 1 | 1 | 2 | Aug 14, 1992 | H2H |
| Roberto Azar | 0 | 2 | 2 | Jul 22, 1992 | H2H |
| Horacio de la Pena | 0 | 2 | 2 | May 16, 1991 | H2H |
| Karel Novacek | 1 | 1 | 2 | May 15, 1991 | H2H |