Mark Kostecki
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Castle Rock, CO
151 matches · 97W–54L · seasons 2019–2026
Match history151 matches
Where you rank locallyagainst everyone at your level
Teams32 teams · 2019–2026
Over timerating by season, and how you rank
By level4 levels played
4.0
63.1%
77W–45L · 53.6% of games
8.0
73.3%
11W–4L · 61.3% of games
7.0mixed
66.7%
6W–3L · 61.4% of games
7.5mixed
60%
3W–2L · 52.1% of games
Games won matters more than matches won — NTRP adjusts on margins.
By lineusually #1 Doubles, 72% of the time
#1 Doubles
72%
109 matches
#2 Doubles
19%
29 matches
#3 Doubles
9%
13 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.
I really think a champion is defined not by their wins but by how they can recover when they fall.