| RR | W | Harri Heliovaara | W/O | H2H |
| RR | L | Jarkko Nieminen | 6-1 6-2 6-0 | H2H |
🇮🇪 IRL · b. 1984-04-17
Colin O'Brien
Active 2008–2013
3–2
0
0
0
0
0
Career summary
Colin O'Brien of Ireland is a former player who competed on the ATP tour from 2008 to 2013. He finished with a career match record of 3–2 (60.0%).
Hard
1–1 (50.0%)
Clay
1–0 (100.0%)
Grass
1–1 (50.0%)
Match results
Methodology
Titles include Slams, Masters, Tour Finals, 500s, 250s, legacy tour events and Olympic gold; Davis Cup is excluded, and walkovers are excluded from all win–loss records. GOAT points value every round reached, scaled per tier (Slam title 2000 anchor; ranking includes Slam champions only, but every player's points are shown here). Elo is a chess-style rating over the full match history (K = 250/(n+5)^0.4); the timeline shows pre-match ratings, sampled. The gold band on the season chart marks the best three-consecutive-year window.