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Colin O'Brien

Sterling Heights, MI
4.0C year-end 2025
i
Computer — generated by the USTA algorithm from match play
35 matches · 11W–24L · seasons 2021–2026

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Match history35 matches
L
2026-08-31 · PEACH-Mazur 7.5 COMBO MIX · #2 Doubles · 7.5 · with Elizabeth Mazurco mixed
doesn’t count toward your NTRP rating
3-6, 4-6
L
2026-08-26 · PEACH-Mazur 7.5 COMBO MIX · #2 Doubles · 7.5 · with Elizabeth Mazurco mixed
doesn’t count toward your NTRP rating
6-3, 1-6, 0-1
L
2026-08-24 · PEACH-Mazur 7.5 COMBO MIX · #3 Doubles · 7.5 · with Michelle Mazur mixed
doesn’t count toward your NTRP rating
4-6, 4-6
L
2026-08-19 · PEACH-Mazur 7.5 COMBO MIX · #2 Doubles · 7.5 · with Michelle Mazur mixed
doesn’t count toward your NTRP rating
3-6, 6-7
L
2026-08-12 · PEACH-Mazur 7.5 COMBO MIX · #2 Doubles · 7.5 · with Elizabeth Mazurco mixed
doesn’t count toward your NTRP rating
2-6, 2-6
L
2026-08-11 · PEACH-DeGuzman 18s 8.0X F · #2 Doubles · 8.0 · with Michelle Livingston mixed
doesn’t count toward your NTRP rating
1-6, 0-6
L
2026-07-21 · PEACH-Itchon 18s 4.0M F4 · #1 Doubles · 4.0 · with MacIej Pietrowicz
expectation pending — we’re still fetching an opponent’s record
6-4, 3-6, 1-0
W
Victor Verma / Kim Baslock
2026-07-17 · PEACH-DeGuzman 18s 8.0X F · #2 Doubles · 8.0 · with Michelle Livingston mixed
doesn’t count toward your NTRP rating
7-6, 6-1
L
2026-07-10 · PEACH-Mazur 18s 7.0X F · #3 Doubles · 7.0 · with Gigi Oleson mixed
doesn’t count toward your NTRP rating
7-5, 2-6, 0-1
W
2026-06-05 · PEACH-DeGuzman 18s 8.0X F · #3 Doubles · 8.0 · with Michelle Livingston mixed
doesn’t count toward your NTRP rating
6-4, 7-6
W
2026-06-02 · PEACH-Itchon 18s 4.0M F4 · #2 Doubles · 4.0 · with Al Itchon
expectation pending — we’re still fetching an opponent’s record
6-4, 2-6, 1-0
L
2026-05-29 · PEACH-Mazur 18s 7.0X F · #2 Doubles · 7.0 · with Gigi Oleson mixed
doesn’t count toward your NTRP rating
4-6, 7-5, 0-1
Where you rank locallyagainst everyone at your level
Teams15 teams · 2021–2026
Over timerating by season, and how you rank
By level6 levels played
4.0
44.4%
8W–10L · 50.3% of games
7.5
0W–2L
not enough matches yet
8.0
0W–2L
not enough matches yet
7.0mixed
20%
1W–4L · 45% of games
7.5mixed
0%
0W–5L · 37.2% of games
8.0mixed
2W–1L
not enough matches yet

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

By lineusually #2 Doubles, 34% of the time
#2 Doubles
34%
12 matches
#1 Doubles
23%
8 matches
#3 Doubles
23%
8 matches
#1 Singles
11%
4 matches
#2 Singles
9%
3 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.

It’s one of the reasons why I like tennis so much. Because you have to figure it out on your own.
Roger Federer