H2H data updated: 2026-09-06 00:00 UTC

Peter Doerner vs Keith Diepraam H2H: 0-1

Keith Diepraam holds a 1–0 lead over Peter Doerner in their ATP head-to-head. Across 1 main-draw meeting, Keith Diepraam leads 1–0 on hard courts. Most recently, Keith Diepraam won the 1969 South African Open round of 64 6-2 8-6 6-3.

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Peter Doerner
AUS Age 75 Right-Handed
H2H
0 – 1
1 main-draw meetings
Keith Diepraam
RSA Age 83 Right-Handed

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Keith Diepraam 6-2 8-6 6-3 Peter Doerner Match data Apr 6, 1969* R64 South African Open ATP 250 Hard

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
Peter Doerner #264 #204 0 1,536 25 35 41.7% 0 0 0 0 0 0
Keith Diepraam — — — 1,544 — — — 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 Peter Doerner Keith Diepraam
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
17 1968 0–1 0.0% — 1,476 0 0 — — — — — — —
18 1969 6–5 54.5% — 1,518 0 0 — — — — — — —
19 1970 5–8 38.5% — 1,471 0 0 — — — — — — —
20 1971 6–6 50.0% — 1,517 0 0 — — — — — — —
21 1972 6–8 42.9% — 1,513 0 0 — — — — — — —
22 1973 0–1 0.0% — 1,498 0 0 — — — — — — —
23 1974 2–4 33.3% #318 1,484 0 0 — — — — — — —
24 1975 0–2 0.0% #264 1,475 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 Peter Doerner Keith Diepraam
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
17 1968 1476 98.1 — — — — — — — 25.0% -2.00 — — — +0.03 — — — — — — — — — — — — — — — —
18 1969 1518 101.3 — — — — +85 — +2 50.0% +0.25 3–0 (100%) — — +1.56 — — — — — — — — — — — — — — — —
19 1970 1471 101.1 — — — — — — +15 40.0% -0.34 2–1 (67%) — — +1.58 — — — — — — — — — — — — — — — —
20 1971 1518 105.7 — — — — +69 — -19 42.9% -0.57 2–0 — — +0.88 — — — — — — — — — — — — — — — —
21 1972 1513 109.2 — — — — — — +5 41.0% -0.44 4–4 (50%) 0–3 (0%) — +0.03 — — — — — — — — — — — — — — — —
22 1973 1499 98.3 — — — — — — — 0.0% -2.50 — 0–1 — +0.01 — — — — — — — — — — — — — — — —
23 1974 1484 101.3 — — — — — — +6 40.0% -0.80 1–2 (33%) 2–0 — +0.35 — — — — — — — — — — — — — — — —
24 1975 1476 106.8 — — — — — — — 16.7% -2.00 — 0–1 — -0.20 — — — — — — — — — — — — — — — —
26 — — — — — — — — — — — — — — — — 1969 1493 102.4 — — — — +48 — — 45.5% -0.18 — — — +0.05
27 — — — — — — — — — — — — — — — — 1970 1522 105.2 — — — — +68 -21 -23 45.0% -0.70 2–3 (40%) — — -0.17
Career — 1537 105.8 — — — — +75 — +6 41.1% -0.46 12–7 (63%) 2–5 (29%) 104.8 +7.44 — 1544 104.2 — — — — +59 -21 -23 45.1% -0.59 2–3 (40%) — — -0.75

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.