 EUA: Pittsburgh - Individual - Principal |
|---|
| 16avos final | Hernandez A. | Callahan H. | 2:0 (6:2, 6:2) | detalhes | 27.06.2018 |
| EUA: Waco - Individual - Principal |
|---|
| Oitavos final | Callahan H. | Shane R. | 0:2 (63:7, 2:6) | detalhes | 29.11.2017 |
| 16avos final | Butler S. | Callahan H. | 0:2 (4:6, 4:6) | detalhes | 28.11.2017 |
| EUA: Columbus - Individual - Principal |
|---|
| Oitavos final | Callahan H. | Sarkissian A. | 0:2 (2:6, 5:7) | detalhes | 23.11.2017 |
| 16avos final | Vaghela V. | Callahan H. | 0:2 (4:6, 3:6) | detalhes | 21.11.2017 |
| EUA: Laguna Niguel - Individual - Principal |
|---|
| Quartos final | Callahan H. | Craig H. | 1:2 (3:6, 6:1, 3:6) | detalhes | 22.09.2017 |
| Oitavos final | Callahan H. | Bullard J. | 0:0 RET. (4:0) | detalhes | 21.09.2017 |
| 16avos final | Descotte M. F. | Callahan H. | 0:2 (3:6, 4:6) | detalhes | 19.09.2017 |
| EUA: Claremont - Individual - Principal |
|---|
| 16avos final | Verboven L. | Callahan H. | 2:1 (7:68, 4:6, 6:4) | detalhes | 13.09.2017 |
| EUA: Edwardsville - Individual - Principal |
|---|
| Meias finais | Ram Harel O. | Callahan H. | 2:1 (6:3, 1:6, 6:3) | detalhes | 12.08.2017 |
| Quartos final | Perez A. | Callahan H. | 1:2 (6:3, 1:6, 4:6) | detalhes | 11.08.2017 |
| Oitavos final | Callahan H. | Rybakov A. | 2:0 (7:5, 7:5) | detalhes | 10.08.2017 |
| 16avos final | Callahan H. | Johnson E. J. | 2:0 (6:4, 6:2) | detalhes | 08.08.2017 |
| EUA: Decatur - Individual - Principal |
|---|
| Oitavos final | Dougaz A. | Callahan H. | 2:0 (6:4, 6:4) | detalhes | 03.08.2017 |
| 16avos final | Nguyen D. | Callahan H. | 1:2 (6:4, 1:6, 64:7) | detalhes | 02.08.2017 |
| EUA: Champaign 2 - Individual - Principal |
|---|
| 16avos final | Riffice S. | Callahan H. | 2:0 (7:5, 6:3) | detalhes | 24.07.2017 |
| EUA: Champaign - Individual - Principal |
|---|
| 16avos final | Adams H. | Callahan H. | 2:1 (6:3, 5:7, 6:3) | detalhes | 18.07.2017 |
| EUA: Pittsburgh - Individual - Principal |
|---|
| Oitavos final | Callahan H. | Lama G. | 1:2 (6:4, 63:7, 4:6) | detalhes | 29.06.2017 |
| 16avos final | Kirchheimer S. | Callahan H. | 0:2 (3:6, 1:6) | detalhes | 28.06.2017 |
| EUA: Rochester - Individual - Principal |
|---|
| 16avos final | Lama G. | Callahan H. | 2:1 (6:4, 0:6, 7:65) | detalhes | 20.06.2017 |
| EUA: Buffalo - Individual - Principal |
|---|
| Oitavos final | Callahan H. | Uchida K. | 0:2 (3:6, 4:6) | detalhes | 15.06.2017 |
| 16avos final | Callahan H. | Gozun A. | 2:0 (6:1, 7:64) | detalhes | 14.06.2017 |
| EUA: Orlando 2 - Individual - Principal |
|---|
| 16avos final | Ramanathan R. | Callahan H. | 2:0 (6:1, 6:2) | detalhes | 01.03.2017 |
| EUA: Indian Harbour Beach - Individual - Principal |
|---|
| 16avos final | Kypson P. | Callahan H. | 2:1 (3:6, 6:4, 6:2) | detalhes | 23.02.2017 |
| EUA: Weston - Individual - Principal |
|---|
| 16avos final | Callahan H. | Vasilyev I. | 1:2 (2:6, 6:0, 4:6) | detalhes | 25.01.2017 |
| EUA: Columbus 2 - Individual - Principal |
|---|
| 16avos final | Krueger M. | Callahan H. | 2:0 (6:4, 6:3) | detalhes | 22.11.2016 |
 Reino Unido: Barnstaple - Individual - Principal |
|---|
| Quartos final | Callahan H. | Nielsen F. | 1:2 (6:4, 1:6, 2:6) | detalhes | 11.11.2016 |
| Oitavos final | Gabb R. | Callahan H. | 1:2 (6:2, 1:6, 4:6) | detalhes | 10.11.2016 |
| 16avos final | Bauvy R. | Callahan H. | 0:2 (4:6, 4:6) | detalhes | 09.11.2016 |
| Reino Unido: Sheffield - Individual - Principal |
|---|
| Oitavos final | Patael B. | Callahan H. | 2:0 (6:3, 6:4) | detalhes | 02.11.2016 |
| 16avos final | Ridout R. | Callahan H. | 0:2 (4:6, 1:6) | detalhes | 01.11.2016 |
| Reino Unido: Loughborough - Individual - Principal |
|---|
| 16avos final | Callahan H. | Marti Y. | 0:2 (4:6, 2:6) | detalhes | 26.10.2016 |
| EUA: Fountain Valley - Individual - Principal |
|---|
| Oitavos final | Garanganga T. | Callahan H. | 2:1 (6:2, 1:6, 6:4) | detalhes | 29.09.2016 |
| 16avos final | Callahan H. | Ejupovic E. | 2:0 (7:5, 6:1) | detalhes | 27.09.2016 |
| EUA: Irvine - Individual - Principal |
|---|
| 16avos final | Callahan H. | Gomez L. | 0:2 (3:6, 65:7) | detalhes | 21.09.2016 |
| EUA: Claremont - Individual - Principal |
|---|
| 16avos final | Callahan H. | Trombetta T. | 0:2 (2:6, 4:6) | detalhes | 13.09.2016 |
| EUA: Champaign - Individual - Principal |
|---|
| 16avos final | Polmans M. | Callahan H. | 2:0 (6:3, 6:3) | detalhes | 09.08.2016 |
| EUA: Decatur - Individual - Principal |
|---|
| 16avos final | King E. | Callahan H. | 2:0 (6:3, 7:5) | detalhes | 03.08.2016 |
| EUA: Pittsburgh - Individual - Principal |
|---|
| 16avos final | Callahan H. | Kwiatkowski T. S. | 0:2 (4:6, 1:6) | detalhes | 28.06.2016 |
| EUA: Rochester - Individual - Principal |
|---|
| Oitavos final | Pasha N. | Callahan H. | 2:0 (6:3, 7:65) | detalhes | 23.06.2016 |
| 16avos final | Carter A. | Callahan H. | 0:2 (2:6, 1:6) | detalhes | 22.06.2016 |
| EUA: Buffalo - Individual - Principal |
|---|
| Oitavos final | Gosea F. | Callahan H. | 2:0 (7:64, 7:5) | detalhes | 16.06.2016 |
| 16avos final | Callahan H. | Garza D. | 2:0 (7:5, 6:4) | detalhes | 14.06.2016 |
 Itália: Frascati - Individual - Principal |
|---|
| 16avos final | Callahan H. | Carli C. | 1:2 (4:6, 6:3, 5:7) | detalhes | 18.05.2016 |
| EUA: Plantation 2 - Individual - Principal |
|---|
| 16avos final | Callahan H. | Ore J. A. | 1:2 (6:3, 4:6, 5:7) | detalhes | 17.02.2016 |
| EUA: Weston - Individual - Principal |
|---|
| 16avos final | Spencer W. | Callahan H. | 2:0 (6:0, 6:3) | detalhes | 29.01.2016 |
| EUA: Champaign - Individual - Principal |
|---|
| 16avos final | Ramanathan R. | Callahan H. | 2:1 (4:6, 6:2, 6:1) | detalhes | 12.08.2015 |
| EUA: Pittsburgh - Individual - Principal |
|---|
| Oitavos final | Gomez E. | Callahan H. | 2:0 (6:2, 6:3) | detalhes | 02.07.2015 |