 Germany: Leimen - Singles - Main |
|---|
| Quarter-finals | Groll T. | Choinski J. | 0:2 (4:6, 4:6) | details | 09.10.2015 |
| 1/8-finals | Torebko P. | Groll T. | 0:2 (4:6, 2:6) | details | 08.10.2015 |
| 1/16-finals | Krstev O. | Groll T. | 1:2 (6:0, 4:6, 2:6) | details | 07.10.2015 |
 France: Metz - Singles - Qualification |
|---|
| Semi-finals | Groll T. | Zverev M. | 0:2 (1:6, 4:6) | details | 20.09.2015 |
| Quarter-finals | Vasilyev I. | Groll T. | 0:2 (0:6, 3:6) | details | 19.09.2015 |
| Germany: Karlsruher - Singles - Main |
|---|
| 1/8-finals | Kern R. | Groll T. | 2:1 (5:7, 6:3, 6:0) | details | 20.08.2015 |
| 1/16-finals | Groll T. | Heller P. | CAN. | details | 18.08.2015 |
| 1/16-finals | Groll T. | Uhlig D. | 2:0 (6:4, 6:0) | details | 18.08.2015 |
 Italy: Lecco - Singles - Main |
|---|
| 1/16-finals | Groll T. | Bensoussan S. | 0:2 (4:6, 3:6) | details | 26.05.2015 |
| France: Quimper - Singles - Main |
|---|
| 1/16-finals | Groll T. | Arnaboldi A. | 1:2 (6:1, 4:6, 2:6) | details | 03.03.2015 |
| Germany: Karlsruher - Singles - Main |
|---|
| 1/16-finals | Groll T. | Choinski J. | 0:2 (4:6, 1:6) | details | 12.08.2014 |
 Switzerland: Vaduz - Singles - Main |
|---|
| 1/16-finals | Bohli S. | Groll T. | 1:0 RET. (6:1, 4:1) | details | 13.03.2013 |
| Germany: Nussloch - Singles - Main |
|---|
| 1/8-finals | Krawietz K. | Groll T. | 2:0 (6:3, 6:4) | details | 31.01.2013 |
| 1/16-finals | Bury A. | Groll T. | 0:2 (4:6, 6:7) | details | 30.01.2013 |
| Germany: Bad Salzdetfurth - Singles - Main |
|---|
| 1/16-finals | Groll T. | Blecha J. | 1:2 (3:6, 6:2, 66:7) | details | 17.10.2012 |
| France: Saint-Dizier - Singles - Main |
|---|
| 1/16-finals | Baumann M. | Groll T. | 2:0 (6:1, 6:2) | details | 09.10.2012 |
| France: Sarreguemines - Singles - Main |
|---|
| 1/8-finals | Groll T. | Benneteau A. | 0:1 RET. (1:6, 2:4) | details | 26.09.2012 |
| 1/16-finals | Bauvy R. | Groll T. | 0:2 (4:6, 4:6) | details | 25.09.2012 |
| France: Plaisir - Singles - Main |
|---|
| 1/8-finals | Groll T. | Obry J. | 0:2 (6:7, 4:6) | details | 19.09.2012 |
| 1/16-finals | Groll T. | Py E. | 2:1 (3:6, 6:1, 7:6) | details | 18.09.2012 |
| Germany: Ueberlingen - Singles - Main |
|---|
| 1/16-finals | Trinker B. | Groll T. | 2:0 (6:3, 6:2) | details | 21.08.2012 |
 Belgium: Eupen - Singles - Main |
|---|
| Quarter-finals | Cagnina J. | Groll T. | 2:1 (6:0, 2:6, 6:2) | details | 09.08.2012 |
| 1/8-finals | Bogaerts R. | Groll T. | 0:2 (4:6, 1:6) | details | 08.08.2012 |
| 1/16-finals | Groll T. | Vatutin A. | 2:0 (7:6, 6:2) | details | 06.08.2012 |
| Belgium: Westende - Singles - Main |
|---|
| 1/16-finals | Groll T. | Netuschil M. | 0:2 (2:6, 6:7) | details | 17.07.2012 |
| Germany: Trier - Singles - Main |
|---|
| 1/16-finals | Kolbe M. | Groll T. | 2:0 (6:3, 7:6) | details | 10.07.2012 |
| Italy: Parma - Singles - Main |
|---|
| 1/16-finals | Contini A. | Groll T. | 2:0 (7:6, 6:3) | details | 05.06.2012 |
| Italy: Bergamo - Singles - Main |
|---|
| 1/8-finals | Groll T. | Eysseric J. | 1:2 (0:6, 7:65, 3:6) | details | 09.05.2012 |
| 1/16-finals | Groll T. | Todaro S. | 2:0 (6:1, 6:0) | details | 07.05.2012 |
| Switzerland: Fallanden - Singles - Main |
|---|
| Quarter-finals | Fucsovics M. | Groll T. | 0:0 RET. (5:2) | details | 30.03.2012 |
| 1/8-finals | Groll T. | Sakharov G. | 2:1 (6:4, 4:6, 6:2) | details | 29.03.2012 |
| 1/16-finals | Daniell M. | Groll T. | 1:1 RET. (5:7, 6:3, 2:4) | details | 28.03.2012 |
| Germany: Schwieberdingen - Singles - Qualification |
|---|
| Final | Groll T. | Otte O. | 0:2 (2:6, 4:6) | details | 09.01.2012 |
| 1/16-finals | Kekez D. | Groll T. | 1:2 (7:65, 2:6, 3:6) | details | 09.01.2012 |
| 1/32-finals | Hillbricht A. | Groll T. | 0:2 (0:6, 0:6) | details | 07.01.2012 |
| Germany: Leimen - Singles - Qualification |
|---|
| Quarter-finals | Morbitzer A. | Groll T. | 1:1 RET. (6:4, 1:6, 4:1) | details | 01.10.2011 |
