H2H data updated: 2026-10-19 00:00 UTC

Mike Cahill vs Zan Guerry H2H: 0-1

Zan Guerry holds a 1–0 lead over Mike Cahill in their ATP head-to-head. Across 1 main-draw meeting, Zan Guerry leads 1–0 on clay. Most recently, Zan Guerry won the 1977 US Open round of 64 6-4 7-5.

Want to explore more matchups? Advanced rivalry search lets you browse current and historical rivalries, unbeaten records, or every matchup for a player.

Mike Cahill
USA Age 74 Right-Handed 183 cm / 6'0"
H2H
0 – 1
1 main-draw meetings
Zan Guerry
USA Age 77 Right-Handed

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Zan Guerry 6-4 7-5 Mike Cahill Match data Sep 4, 1977* R64 US Open Grand Slam 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.

Career Comparison

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
Mike Cahill #448 #58 0 1,727 100 156 39.1% 0 0 0 0 0 0
Zan Guerry #490 #98 0 1,598 41 76 35.0% 0 0 0 0 0 0

Career Progression by Age

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 Mike Cahill Zan Guerry
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
19 — — — — — — — 1968 4–6 40.0% — 1,476 0 0
20 — — — — — — — 1969 8–10 44.4% — 1,526 0 0
21 — — — — — — — 1970 1–3 25.0% — 1,509 0 0
22 1974 4–4 50.0% #138 1,539 0 0 1971 4–6 40.0% — 1,511 0 0
23 1975 10–17 37.0% #79 1,585 0 0 1972 5–7 41.7% — 1,513 0 0
24 1976 13–27 32.5% #136 1,587 0 0 1973 3–5 37.5% #203 1,515 0 0
25 1977 10–18 35.7% #94 1,574 0 0 1974 1–1 50.0% #228 1,536 0 0
26 1978 17–20 45.9% #69 1,691 0 0 1975 2–2 50.0% #205 1,565 0 0
27 1979 18–25 41.9% #113 1,678 0 0 1976 0–6 0.0% #176 1,500 0 0
28 1980 10–19 34.5% #189 1,601 0 0 1977 8–16 33.3% #98 1,562 0 0
29 1981 6–10 37.5% #100 1,629 0 0 1978 2–7 22.2% #279 1,522 0 0
30 1982 12–14 46.2% #98 1,644 0 0 1979 1–3 25.0% #326 1,517 0 0
31 1983 0–2 0.0% #108 1,620 0 0 1980 1–2 33.3% — 1,483 0 0
32 — — — — — — — 1981 0–1 0.0% — 1,477 0 0
33 — — — — — — — 1982 1–1 50.0% — 1,498 0 0

Surface Results by Age

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 Mike Cahill Zan Guerry
Yr HardClayGrassCarpet Yr HardClayGrassCarpet
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 — — — — — — — — — — — — — — — — — 1968 — — — — 3 3 6 50.0% 1 3 4 25.0% — — — —
20 — — — — — — — — — — — — — — — — — 1969 0 1 1 0.0% 6 5 11 54.5% 2 4 6 33.3% — — — —
21 — — — — — — — — — — — — — — — — — 1970 0 1 1 0.0% 1 2 3 33.3% — — — — — — — —
22 1974 — — — — 3 3 6 50.0% — — — — 1 1 2 50.0% 1971 2 2 4 50.0% 2 3 5 40.0% 0 1 1 0.0% — — — —
23 1975 3 4 7 42.9% 6 9 15 40.0% — — — — 1 4 5 20.0% 1972 1 2 3 33.3% 4 4 8 50.0% 0 1 1 0.0% — — — —
24 1976 1 4 5 20.0% 9 15 24 37.5% 0 2 2 0.0% 3 6 9 33.3% 1973 2 4 6 33.3% — — — — 1 1 2 50.0% — — — —
25 1977 2 3 5 40.0% 5 9 14 35.7% 0 1 1 0.0% 3 5 8 37.5% 1974 — — — — 1 1 2 50.0% — — — — — — — —
26 1978 5 6 11 45.5% 6 5 11 54.5% — — — — 6 9 15 40.0% 1975 1 1 2 50.0% 1 1 2 50.0% — — — — — — — —
27 1979 9 9 18 50.0% 8 8 16 50.0% 0 3 3 0.0% 1 5 6 16.7% 1976 0 2 2 0.0% 0 3 3 0.0% — — — — 0 1 1 0.0%
28 1980 4 4 8 50.0% 6 9 15 40.0% — — — — 0 6 6 0.0% 1977 0 3 3 0.0% 8 11 19 42.1% — — — — 0 2 2 0.0%
29 1981 5 5 10 50.0% 0 2 2 0.0% — — — — 1 3 4 25.0% 1978 — — — — 2 3 5 40.0% — — — — 0 4 4 0.0%
30 1982 4 5 9 44.4% 6 4 10 60.0% — — — — 2 5 7 28.6% 1979 0 1 1 0.0% 1 2 3 33.3% — — — — — — — —
31 1983 — — — — 0 2 2 0.0% — — — — — — — — 1980 — — — — 0 1 1 0.0% 1 1 2 50.0% — — — —
32 — — — — — — — — — — — — — — — — — 1981 — — — — 0 1 1 0.0% — — — — — — — —
33 — — — — — — — — — — — — — — — — — 1982 — — — — 1 1 2 50.0% — — — — — — — —
Career — 33 40 73 45.2% 49 66 115 42.6% 0 6 6 0.0% 18 44 62 29.0% — 6 17 23 26.1% 30 41 71 42.3% 5 11 16 31.2% 0 7 7 0.0%

Advanced Statistics Comparison by Age

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 Mike Cahill Zan Guerry
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 — — — — — — — — — — — — — — — — 1968 1477 99.0 — — — — — +41 -13 41.7% -0.50 1–1 — — -0.13
20 — — — — — — — — — — — — — — — — 1969 1527 112.6 — — — — — +58 -60 47.9% -0.10 3–3 (50%) — — -0.60
21 — — — — — — — — — — — — — — — — 1970 1509 100.8 — — — — — +67 — 36.4% -1.36 1–2 (33%) — — +0.06
22 1974 1540 112.1 — — — — — +29 — 50.0% -0.44 1–1 3–0 (100%) — +0.47 1971 1512 109.1 — — — — -8 +73 — 34.8% -0.43 2–1 (67%) 0–3 (0%) 99.0 +0.02
23 1975 1586 128.7 — — — — 0 -9 — 42.9% -0.51 2–9 (18%) 3–2 (60%) 96.8 +0.58 1972 1513 101.7 — — — — -18 +69 — 45.5% -0.03 3–4 (43%) 3–6 (33%) 95.4 +1.00
24 1976 1587 130.4 — — — — -15 -18 — 36.8% -0.84 4–7 (36%) 5–3 (63%) 99.8 -1.12 1973 1516 109.4 — — — — -6 — — 45.8% -0.17 2–3 (40%) 2–2 (50%) 101.5 +0.71
25 1977 1574 123.0 — — — — +15 -15 — 40.3% -0.63 4–7 (36%) 6–4 (60%) 102.2 +1.24 1974 1537 108.8 — — — — — — — 50.0% -0.50 — 1–0 — -0.19
26 1978 1692 139.6 — — — — -36 -52 — 45.8% +0.05 5–4 (56%) 2–8 (20%) 98.4 +0.86 1975 1565 108.3 — — — — — — — 44.4% -0.22 1–0 0–1 — +0.08
27 1979 1679 129.0 — — — — -28 +8 -236 42.7% -0.57 7–6 (54%) 5–6 (45%) 101.0 +0.42 1976 1500 112.0 — — — — -21 +41 — 14.3% -1.71 0–1 0–1 — +0.12
28 1980 1602 134.8 — — — — +12 +31 — 35.5% -0.68 1–4 (20%) 2–7 (22%) 93.1 -0.50 1977 1563 135.9 — — — — -120 +42 — 39.3% -0.73 2–6 (25%) 1–2 (33%) — -0.82
29 1981 1630 125.6 — — — — +36 — — 44.7% -0.55 1–2 (33%) 4–2 (67%) 100.7 +0.59 1978 1523 109.4 — — — — -107 +79 — 37.5% -1.04 1–5 (17%) 2–0 — +0.86
30 1982 1644 127.0 — — — — -2 +3 — 46.6% -0.35 4–5 (44%) 5–2 (71%) 102.8 +1.34 1979 1518 104.3 — — — — — +61 — 40.0% -0.70 0–2 — — -0.17
31 1983 1621 97.8 — — — — — — — 0.0% -2.75 — — — -0.27 1980 1484 91.9 — — — — — — — 0.0% -3.75 — — — +0.48
32 — — — — — — — — — — — — — — — — 1981 1478 100.2 — — — — — — — 0.0% -3.50 — — — -0.08
33 — — — — — — — — — — — — — — — — 1982 1499 109.7 — — — — — — — 40.0% -0.80 1–0 — — -0.23
Career — 1728 136.1 — — — — -7 -5 -236 41.6% -0.53 29–45 (39%) 35–34 (51%) 100.1 +1.42 — 1598 119.7 — — — — -49 +56 -41 39.9% -0.60 17–28 (38%) 9–15 (38%) 94.7 +0.97

Career Rivalries

Each player's five most-played main-draw opponents. The current matchup is highlighted when it appears in a player's top five.