# Colin O'Brien (tennis)

Colin O'Brien (born 17 April 1984) is a former Irish professional tennis player. He was born in Dublin, Ireland.

## Career

O'Brien mainly played on the ITF Men's Circuit and also competed for the Ireland Davis Cup team where he held a 4–5 record. He retired at the end of the 2013 season.

## Singles titles

* Legend (singles)
* Grand Slam (0)
* ATP World Tour Masters 1000 (0)
* ATP World Tour 500 (0)
* ATP World Tour 250 (0)
* ATP Challenger Tour (0)
* ITF Futures (0)
Wins (0)
Runner-up (3)
| No. | Date | Tournament | Surface | Opponent | Score |
| 1. | 21 June 2008 | Dublin, F1 | Carpet | Michel Koning | 3–6, 5–7 |
| 2. | 25 January 2009 | Bergheim bei Salzburg 1, F1 | Carpet | Nicolas Reissig | 3–6, 2–6 |
| 3. | 6 November 2010 | Heraklion, F4 | Hard | Alexandros Jakupovic | 3–6, 3–6 |

## Doubles titles

* Legend (doubles)
* Grand Slam (0)
* ATP World Tour Masters 1000 (0)
* ATP World Tour 500 (0)
* ATP World Tour 250 (0)
* ATP Challenger Tour (0)
* ITF Futures (9)
Wins (9)
| No. | Date | Tournament | Surface | Partner | Opponent | Score |
| 1. | 2 May 2009 | Bournemouth, F5 | Clay | Daniel Smethurst | Ashley Hewitt Richard Gabb | 6–3, 6–2 |
| 2. | 16 May 2009 | Newcastle, F7 | Clay | James McGee | Nick Cavaday Barry King | 6–4, 6–4 |
| 3. | 18 July 2009 | Frinton, F9 | Grass | Tristan Farron-Mahon | Neil Pauffley Marcus Willis | 6–7$^{(5)}$, 7–6$^{(3)}$, [10–6] |
| 4. | 11 October 2009 | Paros 2, F3 | Carpet | Mathieu Guenat | Paris Gemouchidis Manolis Glezos | 6–7$^{(1)}$, 6–3, [10–3] |
| 5. | 9 May 2010 | Edinburgh, F6 | Clay | James Cluskey | Barry King Marcus Willis | 6–3, 6–3 |
| 6. | 24 July 2010 | Dublin, F1 | Carpet | James Cluskey | Colin Ebelthite Barry King | 6–2, 7–6$^{(1)}$ |
| 7. | 21 August 2010 | Jūrmala, F1 | Clay | James Cluskey | Jakub Lustyk David Novak | 2–6, 6–3, [14–12] |
| 8. | 17 March 2013 | Guimarães, F4 | Hard | Sam Barry | Goncalo Pereira Danyal Sualehe | 6–1, 6–1 |
| 9. | 27 July 2013 | Dublin, F1 | Carpet | John Morrissey | Marcus Daniell Richard Gabb | 6–4, 6–7$^{(1)}$, [10–7] |
Runner-up (15)
| No. | Date | Tournament | Surface | Partner | Opponent | Score |
| 1. | 23 June 2007 | Dublin, F1 | Carpet | Barry King | Pierre-Ludovic Duclos Raphael Durek | 5–7, 6–7$^{(2)}$ |
| 2. | 25 May 2008 | Jablonec nad Nisou, F3 | Clay | James Ludlow | Érik Chvojka Jaroslav Pospíšil | 4–6, 3–6 |
| 3. | 14 September 2008 | Nottingham, F14 | Hard | Colin Fleming | Jérémy Blandin Martin Fischer | 0–6, 6–2, [9–11] |
| 4. | 28 September 2008 | Paros, F5 | Carpet | Colin Fleming | Dennis Blömke Dimitris Kleftakos | 4–6, 3–6 |
| 5. | 28 August 2009 | Piombino, F25 | Hard | Philippe De Bonnevie | Alessandro Giannessi Claudio Grassi | 1–6, 6–4, [5–10] |
| 6. | 12 September 2009 | Wrexham, F13 | Hard | Andrew Anderson | Chris Eaton Dominic Inglot | 6–3, 3–6, [6–10] |
| 7. | 27 September 2009 | Kos, F1 | Hard | Mathieu Guenat | Damiano di Ienno Claudio Grassi | 4–6, 6–7$^{(5)}$ |
| 8. | 18 October 2009 | Heraklion, F4 | Carpet | Mathieu Guenat | Alexander Sadecky Mikhail Vasiliev | 6–7$^{(2)}$, 6–7$^{(4)}$ |
| 9. | 28 November 2009 | Kuala Lumpur, F5 | Hard | Rohan Gajjar | Siarhei Betau Dzmitry Zhyrmont | 4–6, 3–6 |
| 10. | 27 February 2010 | Sarajevo, F2 | Carpet | James McGee | Chris Eaton Dominic Inglot | W/O |
| 11. | 18 June 2010 | Kelibia, F3 | Hard | James Cluskey | Laurent Rochette Mikhail Vasiliev | 3–6, 6–1, [6–10] |
| 12. | 31 October 2010 | Heraklion, F3 | Carpet | Sam Barry | Daniel Glancy Marcus Willis | 5–7, 7–5 [8–10] |
| 13. | 25 January 2013 | Sheffield, F2 | Hard | Sam Barry | Ken Skupski Neal Skupski | 6–3, 3–6, [5–10] |
| 14. | 3 March 2013 | Loulé, F2 | Hard | Sam Barry | Ivan Arenas-Gualda Enrique Lopez-Perez | 7–6$^{(2)}$, 6–7$^{(5)}$, [4–10] |
| 15. | 22 September 2013 | Plaisir, F16 | Hard | Dean O'Brien | Remi Boutillier Julien Obry | 6–3, 6–7$^{(4)}$, [14–16] |