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William Koestler

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Oxford, MS
4.0M year-end 2023
i
Mixed Exclusive — this player’s rating comes only from mixed play
71 matches · 44W–27L · seasons 2016–2025
Match history71 matches
W
2025-07-15 · Goforth - NC - Oxford · #1 Doubles · 4.0 · with Emily Shows mixed
no estimate for this season
i
Our model did not follow this player through that season: none of their matches that season carried an individual NTRP level (55 & Over and combo leagues are rated on combined levels), so it had nothing to start from. The match still counts toward the USTA rating.
7-5, 6-4
W
2025-06-25 · Goforth - NC - Oxford · #1 Doubles · 4.0 · with Emily Shows mixed
no estimate for this season
i
Our model did not follow this player through that season: none of their matches that season carried an individual NTRP level (55 & Over and combo leagues are rated on combined levels), so it had nothing to start from. The match still counts toward the USTA rating.
2-6, 7-5, 1-0
W
2025-06-18 · Goforth - NC - Oxford · #1 Doubles · 4.0 · with Emily Shows mixed
no estimate for this season
i
Our model did not follow this player through that season: none of their matches that season carried an individual NTRP level (55 & Over and combo leagues are rated on combined levels), so it had nothing to start from. The match still counts toward the USTA rating.
6-1, 6-1
W
2025-06-16 · Goforth - NC - Oxford · #2 Doubles · 4.0 · with Emily Shows mixed
no estimate for this season
i
Our model did not follow this player through that season: none of their matches that season carried an individual NTRP level (55 & Over and combo leagues are rated on combined levels), so it had nothing to start from. The match still counts toward the USTA rating.
6-2, 6-3
W
2025-05-28 · Goforth - NC - Oxford · #1 Doubles · 4.0 · with Emily Shows mixed
no estimate for this season
i
Our model did not follow this player through that season: none of their matches that season carried an individual NTRP level (55 & Over and combo leagues are rated on combined levels), so it had nothing to start from. The match still counts toward the USTA rating.
7-5, 6-0
W
2025-05-22 · Goforth - NC - Oxford · #1 Doubles · 4.0 · with Emily Shows mixed
no estimate for this season
i
Our model did not follow this player through that season: none of their matches that season carried an individual NTRP level (55 & Over and combo leagues are rated on combined levels), so it had nothing to start from. The match still counts toward the USTA rating.
6-4, 6-4
W
Kai Harrison
2024-04-06 · Singles tourney
doesn’t count toward your NTRP rating
6-1
L
2023-10-28 · 8.0 18+ Worsham · #1 Doubles · 8.0 · with Madelyn Marley mixed championship
no estimate for this season
i
Our model did not follow this player through that season: none of their matches that season carried an individual NTRP level (55 & Over and combo leagues are rated on combined levels), so it had nothing to start from. The match still counts toward the USTA rating.
6-3, 5-7, 0-1
L
2023-10-28 · 8.0 18+ Worsham · #2 Doubles · 8.0 · with Madelyn Marley mixed championship
no estimate for this season
i
Our model did not follow this player through that season: none of their matches that season carried an individual NTRP level (55 & Over and combo leagues are rated on combined levels), so it had nothing to start from. The match still counts toward the USTA rating.
6-2, 3-6, 0-1
W
2023-10-27 · 8.0 18+ Worsham · #3 Doubles · 8.0 · with Madelyn Marley mixed championship
no estimate for this season
i
Our model did not follow this player through that season: none of their matches that season carried an individual NTRP level (55 & Over and combo leagues are rated on combined levels), so it had nothing to start from. The match still counts toward the USTA rating.
7-5, 4-6, 1-0
W
Bo Bowman / Jamie Clayton
2023-08-19 · 8.0 18+ Worsham · #3 Doubles · 8.0 · with Madelyn Marley mixed championship
no estimate for this season
i
Our model did not follow this player through that season: none of their matches that season carried an individual NTRP level (55 & Over and combo leagues are rated on combined levels), so it had nothing to start from. The match still counts toward the USTA rating.
6-2, 6-0
W
Hector Custode / Maggie Savell
2023-08-19 · 8.0 18+ Worsham · #1 Doubles · 8.0 · with Madelyn Marley mixed championship
no estimate for this season
i
Our model did not follow this player through that season: none of their matches that season carried an individual NTRP level (55 & Over and combo leagues are rated on combined levels), so it had nothing to start from. The match still counts toward the USTA rating.
4-6, 6-1, 1-0
Where you rank locallyagainst everyone at your level
Teams2 teams · 2023–2025
Over timerating by season, and how you rank
By level2 levels played
4.0mixed
100%
6W–0L · 64.3% of games
8.0mixed
50%
3W–3L · 56.1% of games

Games won matters more than matches won — NTRP adjusts on margins.

By lineusually Singles, 83% of the time
Singles
83%
59 matches
#1 Doubles
10%
7 matches
#2 Doubles
4%
3 matches
#3 Doubles
3%
2 matches

How often, across every team and every match we hold — including ones that do not count toward a rating. Advanced stats has a court-position table too, and it answers a different question: how well you do there, over matches that count. A team’s own page shows how that one team uses you.

Not affiliated with or endorsed by the USTA. Ratings labelled as published are USTA year-end figures; anything we describe as an estimate is ours, not USTA’s. Match data is from USTA TennisLink.

Tennis is mostly mental. You win or lose the match before you even go out there.
Venus Williams