Includes finals, playoffs and exhibition games, so totals run higher than regular-season figures.
| Season | ||||||||
|---|---|---|---|---|---|---|---|---|
| 1998 Wta tourIreland | 4 | 2 | 4 | 5 | 43 | 43 | 1 | 4 |
| 1996 Wta tourIreland | 2 | 1 | 3 | 2 | 23 | 21 | 0 | 2 |
| 1995 Wta tourIreland | 1 | 0 | 0 | 2 | 1 | 12 | 0 | 1 |
| 1990 Wta tourIreland | 2 | 1 | 2 | 2 | 16 | 14 | 0 | 2 |
| 1989 Wta tourIreland | 3 | 1 | 3 | 4 | 27 | 32 | 0 | 3 |
| 1988 Wta tourIreland | 1 | 0 | 0 | 2 | 5 | 12 | 0 | 1 |
| 1986 Wta tourIreland | 1 | 0 | 0 | 2 | 6 | 12 | 0 | 1 |
| Career7 seasons | 14 | 5 | 12 | 19 | 121 | 146 | 1 | 14 |
| Game | |||||||
|---|---|---|---|---|---|---|---|
| Fed Cup G2 RRD: GEO vs IRL: Round robin v Margalita ChakhnashviliL 0-2 8 May | 0 | 0 | 2 | 6 | 12 | 0 | 1 |
| Fed Cup G2 RRD: IRL vs MDA: Round robin v Evghenia AblovatchiW 2-1 7 May | 1 | 2 | 1 | 17 | 12 | 0 | 1 |
| Fed Cup G2 RRD: EST vs IRL: Round robin v Helene HolterW 2-0 6 May | 1 | 2 | 0 | 13 | 6 | 0 | 1 |
| Fed Cup G2 RRD: BIH vs IRL: Round robin v Mervana Jugic SalkicL 0-2 5 May | 0 | 0 | 2 | 7 | 13 | 1 | 1 |
| Split | ||||||||
|---|---|---|---|---|---|---|---|---|
| LossesResult | 9 | 0.0 | 0.2 | 2.0 | 6.1 | 13.0 | 0.1 | 1.0 |
| WinsResult | 5 | 1.0 | 2.0 | 0.2 | 13.2 | 5.8 | 0.0 | 1.0 |
| Regular seasonStage · won 5 of 14 | 14 | 0.4 | 0.9 | 1.4 | 8.6 | 10.4 | 0.1 | 1.0 |
| Angelika KanellopoulouOpponent · won 0 of 1 | 1 | 0.0 | 0.0 | 2.0 | 6.0 | 12.0 | 0.0 | 1.0 |
| Dragana ZaricOpponent · won 0 of 1 | 1 | 0.0 | 0.0 | 2.0 | 1.0 | 12.0 | 0.0 | 1.0 |
| Evghenia AblovatchiOpponent · won 1 of 1 | 1 | 1.0 | 2.0 | 1.0 | 17.0 | 12.0 | 0.0 | 1.0 |
| Helene HolterOpponent · won 1 of 1 | 1 | 1.0 | 2.0 | 0.0 | 13.0 | 6.0 | 0.0 | 1.0 |
| Karmen SkuljOpponent · won 0 of 1 | 1 | 0.0 | 0.0 | 2.0 | 5.0 | 12.0 | 0.0 | 1.0 |
| Kerry Ann LimOpponent · won 1 of 1 | 1 | 1.0 | 2.0 | 0.0 | 12.0 | 2.0 | 0.0 | 1.0 |
| Lela ZainalOpponent · won 1 of 1 | 1 | 1.0 | 2.0 | 0.0 | 12.0 | 4.0 | 0.0 | 1.0 |
| Margalita ChakhnashviliOpponent · won 0 of 1 | 1 | 0.0 | 0.0 | 2.0 | 6.0 | 12.0 | 0.0 | 1.0 |
| Maria Strandlund TomsvikOpponent · won 0 of 1 | 1 | 0.0 | 0.0 | 2.0 | 5.0 | 12.0 | 0.0 | 1.0 |
| Mervana Jugic SalkicOpponent · won 0 of 1 | 1 | 0.0 | 0.0 | 2.0 | 7.0 | 13.0 | 1.0 | 1.0 |
| Sandra OlsenOpponent · won 0 of 1 | 1 | 0.0 | 1.0 | 2.0 | 11.0 | 16.0 | 0.0 | 1.0 |
| Sarah CastillejoOpponent · won 0 of 1 | 1 | 0.0 | 1.0 | 2.0 | 10.0 | 16.0 | 0.0 | 1.0 |
| Stefania StefansdottirOpponent · won 1 of 1 | 1 | 1.0 | 2.0 | 0.0 | 12.0 | 5.0 | 0.0 | 1.0 |
| Yael SegalOpponent · won 0 of 1 | 1 | 0.0 | 0.0 | 2.0 | 4.0 | 12.0 | 0.0 | 1.0 |
| HardGround · won 3 of 7 | 7 | 0.4 | 1.1 | 1.1 | 9.4 | 9.6 | 0.0 | 1.0 |
| ClayGround · won 2 of 6 | 6 | 0.3 | 0.7 | 1.5 | 8.3 | 11.2 | 0.2 | 1.0 |
Wins-losses for OHalloran. Tap a rival for the full head to head.
Stats from official league and public sports feeds. Updated hourly. Tennis history by Jeff Sackmann / Tennis Abstract (CC BY-NC-SA 4.0).