H2H data updated: 2026-09-01 00:00 UTC

Jeff Borowiak vs Mark Cox H2H: 3-3

Jeff Borowiak and Mark Cox are tied 3–3 in their ATP head-to-head. Across 6 main-draw meetings, they are tied 1–1 on carpet, while Mark Cox leads 2–0 on grass. Most recently, Mark Cox won the 1977 Queen's Club Championships round of 64 9-8 9-8.

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Jeff Borowiak
USA Age 76 Right-Handed 193 cm / 6'4"
H2H
3 – 3
6 main draw meetings
Mark Cox
GBR Age 83 Left-Handed 185 cm / 6'1"

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Mark Cox #15 9-8 9-8 Jeff Borowiak #41 Match data Jun 15, 1977* R64 Queen's Club Championships ATP 250 Grass
Jeff Borowiak #42 7-5 4-6 6-3 Mark Cox #32 Match data Jan 22, 1975* R64 Philadelphia Wct ATP 250 Carpet
Jeff Borowiak #83 0-6 7-6 7-5 Mark Cox #19 Match data Nov 7, 1973* R32 Stockholm Open ATP 250 Hard
Mark Cox 2-6 9-7 6-3 Jeff Borowiak Match data Jun 13, 1973* R64 Nottingham ATP 250 Grass
Mark Cox 7-6 6-2 Jeff Borowiak Match data Nov 10, 1972* QF Gothenberg Wct ATP 250 Carpet
Jeff Borowiak 6-4 6-4 Mark Cox Match data Sep 21, 1972* R32 Los Angeles 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
Jeff Borowiak #920 #20 0 1,958 290 304 48.8% 0 0 0 0 5 5
Mark Cox #486 #12 0 2,023 406 272 59.9% 0 0 0 0 13 13

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 Jeff Borowiak Mark Cox
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
18 1968 6–10 37.5% — 1,470 0 0 — — — — — — —
19 1969 3–2 60.0% — 1,511 0 0 — — — — — — —
20 1970 6–7 46.2% — 1,564 0 0 — — — — — — —
21 1971 26–20 56.5% — 1,759 0 0 — — — — — — —
22 1972 20–28 41.7% — 1,825 0 0 — — — — — — —
23 1973 21–33 38.9% #82 1,732 0 0 — — — — — — —
24 1974 34–26 56.7% #40 1,858 0 2 1968 52–23 69.3% — 1,715 0 0
25 1975 31–26 54.4% #48 1,807 0 2 1969 35–16 68.6% — 1,838 0 2
26 1976 18–23 43.9% #60 1,724 0 2 1970 39–31 55.7% — 1,800 0 3
27 1977 47–24 66.2% #25 1,825 0 5 1971 27–31 46.6% — 1,819 0 3
28 1978 16–25 39.0% #98 1,671 0 5 1972 43–29 59.7% — 1,874 0 5
29 1979 5–13 27.8% #125 1,617 0 5 1973 56–28 66.7% #22 1,894 0 8
30 1980 5–5 50.0% #189 1,670 0 5 1974 24–16 60.0% #30 1,833 0 8
31 1981 18–19 48.6% #52 1,763 0 5 1975 30–12 71.4% #25 1,934 0 11
32 1982 21–20 51.2% #94 1,742 0 5 1976 22–15 59.5% #17 1,965 0 12
33 1983 13–19 40.6% #98 1,652 0 5 1977 35–21 62.5% #26 1,828 0 13
34 1984 0–4 0.0% #520 1,599 0 5 1978 15–16 48.4% #68 1,769 0 13
35 — — — — — — — 1979 17–16 51.5% #76 1,789 0 13
36 — — — — — — — 1980 11–13 45.8% #140 1,675 0 13
37 — — — — — — — 1981 0–5 0.0% — 1,599 0 13

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 Jeff Borowiak Mark Cox
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 %
18 1968 4 2 6 66.7% 1 2 3 33.3% 1 5 6 16.7% 0 1 1 0.0% — — — — — — — — — — — — — — — — —
19 1969 3 1 4 75.0% 0 1 1 0.0% — — — — — — — — — — — — — — — — — — — — — — — — —
20 1970 1 1 2 50.0% 2 3 5 40.0% 3 2 5 60.0% 0 1 1 0.0% — — — — — — — — — — — — — — — — —
21 1971 11 10 21 52.4% 6 5 11 54.5% 4 3 7 57.1% 5 2 7 71.4% — — — — — — — — — — — — — — — — —
22 1972 9 9 18 50.0% 1 5 6 16.7% 0 1 1 0.0% 10 13 23 43.5% — — — — — — — — — — — — — — — — —
23 1973 8 8 16 50.0% 9 12 21 42.9% 1 3 4 25.0% 3 10 13 23.1% — — — — — — — — — — — — — — — — —
24 1974 9 9 18 50.0% 13 11 24 54.2% 2 3 5 40.0% 10 3 13 76.9% 1968 24 11 35 68.6% 18 8 26 69.2% 6 2 8 75.0% 4 2 6 66.7%
25 1975 11 9 20 55.0% 8 10 18 44.4% 3 2 5 60.0% 9 5 14 64.3% 1969 11 5 16 68.8% 12 6 18 66.7% 4 2 6 66.7% 8 3 11 72.7%
26 1976 3 3 6 50.0% 12 10 22 54.5% 0 2 2 0.0% 3 8 11 27.3% 1970 10 9 19 52.6% 14 6 20 70.0% 12 9 21 57.1% 3 7 10 30.0%
27 1977 7 8 15 46.7% 19 5 24 79.2% 0 2 2 0.0% 21 9 30 70.0% 1971 9 11 20 45.0% 8 7 15 53.3% 5 6 11 45.5% 5 7 12 41.7%
28 1978 1 5 6 16.7% 13 9 22 59.1% 0 3 3 0.0% 2 8 10 20.0% 1972 14 9 23 60.9% 8 5 13 61.5% 2 1 3 66.7% 19 14 33 57.6%
29 1979 0 3 3 0.0% 2 5 7 28.6% 1 1 2 50.0% 2 4 6 33.3% 1973 11 4 15 73.3% 10 11 21 47.6% 10 2 12 83.3% 25 11 36 69.4%
30 1980 3 3 6 50.0% — — — — — — — — 2 2 4 50.0% 1974 8 4 12 66.7% 1 2 3 33.3% 2 2 4 50.0% 13 8 21 61.9%
31 1981 11 9 20 55.0% 2 3 5 40.0% 3 2 5 60.0% 2 5 7 28.6% 1975 3 2 5 60.0% 3 3 6 50.0% 2 1 3 66.7% 22 6 28 78.6%
32 1982 4 7 11 36.4% 4 3 7 57.1% 10 6 16 62.5% 3 4 7 42.9% 1976 9 2 11 81.8% 5 4 9 55.6% 2 2 4 50.0% 6 7 13 46.2%
33 1983 1 6 7 14.3% 7 5 12 58.3% 2 4 6 33.3% 3 4 7 42.9% 1977 8 8 16 50.0% 5 5 10 50.0% 8 2 10 80.0% 14 6 20 70.0%
34 1984 0 1 1 0.0% 0 2 2 0.0% 0 1 1 0.0% — — — — 1978 5 4 9 55.6% 2 1 3 66.7% 1 2 3 33.3% 7 9 16 43.8%
35 — — — — — — — — — — — — — — — — — 1979 9 8 17 52.9% 1 2 3 33.3% 4 3 7 57.1% 3 3 6 50.0%
36 — — — — — — — — — — — — — — — — — 1980 5 5 10 50.0% 2 3 5 40.0% 2 2 4 50.0% 2 3 5 40.0%
37 — — — — — — — — — — — — — — — — — 1981 0 1 1 0.0% 0 2 2 0.0% 0 2 2 0.0% — — — —
Career — 86 94 180 47.8% 99 91 190 52.1% 30 40 70 42.9% 75 79 154 48.7% — 126 83 209 60.3% 89 65 154 57.8% 60 38 98 61.2% 131 86 217 60.4%

Advanced Statistics Comparison by Age

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 Jeff Borowiak Mark Cox
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 1968 1471 97.5 — — — — +106 +20 -42 37.8% -0.84 0–2 — — +0.39 — — — — — — — — — — — — — — — —
19 1969 1512 107.1 — — — — +167 — — 50.0% +0.43 3–1 (75%) — — +0.31 — — — — — — — — — — — — — — — —
20 1970 1565 109.0 — — — — +89 -54 -66 46.7% -0.47 1–0 0–2 — -0.25 — — — — — — — — — — — — — — — —
21 1971 1759 131.8 — — — — +6 -154 -148 53.0% +0.15 10–5 (67%) 9–6 (60%) — -1.12 — — — — — — — — — — — — — — — —
22 1972 1826 149.5 — — — — +40 -240 — 43.2% -0.46 10–10 (50%) 9–10 (47%) — -7.30 — — — — — — — — — — — — — — — —
23 1973 1733 135.6 — — — — +29 -103 -173 43.0% -0.37 9–15 (38%) 7–10 (41%) — -4.54 — — — — — — — — — — — — — — — —
24 1974 1859 146.3 — — — — +25 -114 -273 56.0% +0.23 8–10 (44%) 12–6 (67%) — -4.92 1968 1715 125.1 — — — — +101 -20 -76 64.9% +1.14 9–9 (50%) — — +2.87
25 1975 1808 148.3 — — — — +64 -110 -178 53.6% +0.42 11–12 (48%) 5–9 (36%) — -5.88 1969 1839 129.2 — — — — +75 -68 -126 60.3% +0.67 12–5 (71%) — — +4.09
26 1976 1725 143.4 — — — — +66 -6 — 47.9% -0.08 9–9 (50%) 6–8 (43%) — -2.54 1970 1800 135.6 — — — — -58 +55 +20 55.8% +0.34 9–10 (47%) 2–6 (25%) — -1.59
27 1977 1825 151.8 — — — — -12 +75 — 61.0% +0.81 14–7 (67%) 9–9 (50%) — +0.48 1971 1819 144.9 — — — — -45 +46 -3 47.1% -0.09 6–6 (50%) 13–13 (50%) — -7.37
28 1978 1672 145.7 — — — — -11 +208 -147 43.0% -0.37 3–6 (33%) 4–4 (50%) — -3.12 1972 1874 146.7 — — — — -12 +65 -36 56.3% +0.44 18–12 (60%) 15–11 (58%) — -2.93
29 1979 1618 131.4 — — — — -19 +166 — 38.3% -0.58 2–5 (29%) 3–6 (33%) — -1.00 1973 1894 146.3 — — — — +68 -87 +21 61.9% +0.79 18–9 (67%) 14–12 (54%) — -0.98
30 1980 1671 131.2 — — — — -19 — — 59.1% +0.91 1–3 (25%) 1–1 — -0.33 1974 1833 142.2 — — — — +74 -51 +60 60.8% +0.62 3–7 (30%) 14–9 (61%) — -0.76
31 1981 1764 143.3 — — — — -10 -18 -91 48.9% -0.23 4–5 (44%) 10–10 (50%) — -1.40 1975 1934 154.1 — — — — +99 -157 -28 66.7% +1.39 6–3 (67%) 4–6 (40%) — -0.83
32 1982 1742 140.8 — — — — -6 -6 -10 53.5% +0.11 4–8 (33%) 9–8 (53%) — -2.10 1976 1965 146.6 — — — — +85 -198 -95 52.6% -0.01 12–4 (75%) 8–6 (57%) — -3.40
33 1983 1652 129.5 — — — — -39 +97 +56 43.8% -0.57 5–5 (50%) 9–4 (69%) — -1.80 1977 1828 146.3 — — — — +95 -114 +115 57.0% +0.45 11–3 (79%) 7–11 (39%) — -0.20
34 1984 1599 108.8 — — — — — — — 20.0% -1.60 0–2 0–1 — -0.33 1978 1770 142.4 — — — — +56 -48 +123 50.0% +0.15 3–5 (38%) 5–1 (83%) — -1.06
35 — — — — — — — — — — — — — — — — 1979 1790 141.2 — — — — +18 -86 +110 53.0% +0.22 3–6 (33%) 6–6 (50%) — -1.30
36 — — — — — — — — — — — — — — — — 1980 1676 120.6 — — — — +49 -18 +194 46.8% -0.26 4–4 (50%) 7–6 (54%) — +1.71
37 — — — — — — — — — — — — — — — — 1981 1599 106.1 — — — — — — — 21.4% -1.79 0–2 1–1 — -0.05
Career — 1959 147.5 — — — — +19 -10 -85 49.6% -0.02 94–105 (47%) 93–94 (50%) 100.6 -6.02 — 2023 146.1 — — — — +46 -36 +21 57.2% +0.50 114–85 (57%) 96–88 (52%) 101.1 -1.75

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.