Player data updated: 2026-09-01 02:16 UTC
A. O'Brien
A. O'Brien represented the United States on the ATP Tour. In TennisDB's records, A. O'Brien finished with a career record of 0–1 and no singles titles.
Peak ranking
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Elo peak
1500 (3rd percentile)
Career record
0–1 (0.0%)
Career titles
0
Prize money
$3,526,390
Records cover recorded main-draw singles results in TennisDB's ATP event archive, including credited walkovers; qualifying is shown separately below.
ATP Matches full match log →
| Opponent | Score | Result | H2H | Match Data | Date | Round | Tournament | Category | Surface |
|---|---|---|---|---|---|---|---|---|---|
| Alex Kim | 6-3 2-6 4-6 | L | — | Match data | Aug 15, 2001* | R64 | Washington Open | ATP 500 | Hard |
Rivals all rivalries →
| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| Alex Kim | 0 | 1 | 1 | Aug 15, 2001 | — |
Career Results
| Season | Age | W | L | M | Win % | Start Rank | End Rank |
|---|---|---|---|---|---|---|---|
| 2001 | 31 | 0 | 1 | 1 | 0.0% | — | — |
| Career | 0 | 1 | 1 | 0.0% | — | — |
Career Results by Surface
| Season | Age | Hard | Clay | Grass | Total | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| W | L | M | Win % | W | L | M | Win % | W | L | M | Win % | W | L | M | Win % | ||
| 2001 | 31 | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | 0 | 1 | 1 | 0.0% |
| Career | — | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | 0 | 1 | 1 | 0.0% |
Advanced Stats
| Season | Age | Elo | P+ | Serve+ | Return+ | PD | TPW% | Hard Elo | Clay Elo | Grass Elo | Set Win % | Set Margin | Dec. Set | Tiebreak | Pressure+ | Schedule |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2001 | 31 | 1483 | 98.7 | — | — | — | — | — | — | — | 33.3% | -1.00 | 0–1 | — | — | +0.15 |
| Career | 1500 | 99.3 | — | — | — | — | — | — | — | 33.3% | -1.00 | 0–1 | — | — | +15.00 |
Tournament Results by Category
ATP Ranking History full ranking history →
Career high
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Career-high date
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First Top 100
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First Top 50
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First Top 20
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First Top 10
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Ranking History Matrix
No ranking history available.
Frequently Asked Questions
- How old is A. O'Brien?
- A. O'Brien is 56 years old, born on March 7, 1970.
- Which country does A. O'Brien represent?
- A. O'Brien represents United States in TennisDB's ATP records.
- How tall is A. O'Brien?
- A. O'Brien is 185 cm / 6'1".
- Does A. O'Brien use a one-handed or two-handed backhand?
- A. O'Brien uses a two-handed backhand.
- Is A. O'Brien left-handed or right-handed?
- A. O'Brien plays right-handed.
- How many Grand Slams has A. O'Brien won?
- A. O'Brien has not won a Grand Slam title.
- How many Masters 1000 titles has A. O'Brien won?
- TennisDB does not group any of A. O'Brien's titles under the modern Masters 1000 category.
- What is A. O'Brien's career win-loss record?
- A. O'Brien has a career ATP singles record of 0 wins and 1 losses (0.0%).
- How much career prize money has A. O'Brien earned?
- A. O'Brien has earned at least $3,526,390 in career prize money from professional tennis.
- Which seasons of A. O'Brien's career appear in TennisDB?
- A. O'Brien appears in TennisDB's ATP main-tour match records in 2001.
- Who has A. O'Brien faced most often?
- A. O'Brien's most frequent opponent is Alex Kim, with a head-to-head record of 0–1 across 1 meeting.