Select tournament type
| 1/16-finals | Vucic I. | Klec I. | 2:1 (4:6, 6:2, 7:68) | details | 18.08.2015 | ||
| 1/16-finals | Klec I. | Prader P. | 1:2 (63:7, 6:2, 4:6) | details | 04.08.2015 | ||
| Quarter-finals | Klec I. | Djere L. | 0:2 (4:6, 4:6) | details | 25.07.2015 | ||
| 1/16-finals | Klec I. | Riba P. | 0:2 (2:6, 2:6) | details | 14.07.2015 | ||
| 1/16-finals | Klec I. | Dalla Valle E. | 0:2 (3:6, 4:6) | details | 07.07.2015 | ||
| Final | Razborsek N. | Klec I. | 2:0 (6:1, 6:0) | details | 04.07.2015 | ||
| Semi-finals | Martinez M. N. | Klec I. | 1:1 RET. (6:2, 4:6, 0:1) | details | 03.07.2015 | ||
| Quarter-finals | Bonadio R. | Klec I. | 1:2 (6:4, 4:6, 3:6) | details | 02.07.2015 | ||
| 1/8-finals | Borgo F. | Klec I. | 0:2 (2:6, 2:6) | details | 01.07.2015 | ||
| 1/16-finals | Vilardo F. | Klec I. | 0:2 (65:7, 2:6) | details | 30.06.2015 | ||
| 1/16-finals | Klec I. | Riba P. | 0:2 (4:6, 3:6) | details | 16.06.2015 | ||
| 1/8-finals | Klec I. | Ghedin R. | 1:2 (6:4, 64:7, 4:6) | details | 03.06.2015 | ||
| 1/16-finals | Klec I. | Teodori F. | 2:0 (6:2, 6:2) | details | 02.06.2015 | ||
| 1/16-finals | Lorenzi P. | Klec I. | 2:0 (6:2, 6:2) | details | 19.05.2015 | ||
| Quarter-finals | Stepanek R. | Klec I. | 2:1 (4:6, 6:3, 6:3) | details | 25.04.2015 | ||
| 1/16-finals | Arevalo M. | Klec I. | 2:0 (6:4, 6:1) | details | 21.04.2015 | ||
| 1/16-finals | Klec I. | Mugevicius L. | 1:2 (7:5, 3:6, 5:7) | details | 07.04.2015 | ||
| 1/8-finals | Cunha H. | Klec I. | 2:0 (7:63, 6:2) | details | 03.04.2015 | ||
| 1/16-finals | Klec I. | Andujar P. | 1:0 RET. (7:62, 1:0) | details | 01.04.2015 | ||
| 1/16-finals | Klec I. | Karatsev A. | 0:2 (63:7, 3:6) | details | 17.03.2015 | ||
| 1/8-finals | Klec I. | Teixeira M. | 0:2 (1:6, 2:6) | details | 14.01.2015 | ||
| 1/16-finals | Klec I. | Martin F. | 2:0 (6:4, 6:2) | details | 13.01.2015 | ||
| 1/16-finals | Kim Y. S. | Klec I. | 2:0 (6:3, 6:3) | details | 21.10.2014 | ||
| 1/16-finals | Andreozzi G. | Klec I. | 2:0 (6:1, 7:64) | details | 23.09.2014 | ||
| Quarter-finals | Ghem A. | Klec I. | 2:0 (7:64, 6:3) | details | 19.09.2014 | ||
| 1/8-finals | Gaio F. | Klec I. | 0:2 (3:6, 0:6) | details | 18.09.2014 | ||
| 1/16-finals | Klec I. | Elias G. | 2:0 (6:4, 7:5) | details | 17.09.2014 | ||
| 1/16-finals | Kontinen M. | Klec I. | 2:0 (6:3, 6:4) | details | 09.09.2014 | ||
| 1/16-finals | Molchanov D. | Klec I. | 2:1 (6:4, 1:6, 6:3) | details | 03.09.2014 | ||
| Quarter-finals | Gombos N. | Klec I. | 2:1 (2:6, 6:3, 7:5) | details | 19.07.2014 | ||
| 1/16-finals | Niki T. | Klec I. | 2:1 (2:6, 7:67, 6:4) | details | 15.07.2014 | ||
| Final | Klec I. | Vanni L. | 0:2 (4:6, 4:6) | details | 05.07.2014 | ||
| Semi-finals | Klec I. | Naso G. | 2:0 (6:4, 6:4) | details | 04.07.2014 | ||
| Quarter-finals | Teixeira M. | Klec I. | 0:2 (0:6, 5:7) | details | 03.07.2014 | ||
| 1/8-finals | Klec I./Negritu Ch. | Barroso Campos A./Lopez Morillo I. | 0:2 (5:7, 4:6) | details | 15.02.2022 | ||
| Quarter-finals | Jebavy R./Zelenay I. | Klec I./Sproch D. | 2:0 (6:1, 6:1) | details | 20.06.2019 | ||
| 1/8-finals | Klec I./Sproch D. | Kopriva V./Vrbensky M. | 2:0 (7:65, 6:0) | details | 18.06.2019 | ||
| 1/8-finals | Klec I./Sproch D. | Cornea V. V./Jecan M. A. | CAN. | details | 18.06.2019 | ||
| 1/8-finals | Brkic T./Pavic A. | Klec I./Sproch D. | 2:1 (6:0, 4:6, 12:10) | details | 18.06.2018 | ||
| Quarter-finals | Klec I./Nedovyesov A. | Kovalik J./Mertl J. | 0:2 (2:6, 2:6) | details | 18.06.2015 | ||
| 1/8-finals | Djokovic D./Vajda P. | Klec I./Nedovyesov A. | 0:2 (1:6, 1:6) | details | 16.06.2015 | ||
| 1/8-finals | Garza D./Klec I. | Demoliner M./Reyes-Varela M. A. | 0:2 (2:6, 4:6) | details | 21.04.2015 | ||
| 1/8-finals | Klec I./Metreveli A. | Albot R./Nedovyesov A. | 0:2 (2:6, 5:7) | details | 08.04.2015 | ||
| 1/8-finals | Klec I./Paire B. | Gonzalez M./Maytin R. | 0:2 (3:6, 3:6) | details | 01.04.2015 | ||
| Quarter-finals | Klec I./Kretschmer G. | Martin F./Raja P. | 0:2 (5:7, 1:6) | details | 14.01.2015 | ||
| 1/8-finals | Idmbarek Y./Jdi M. | Klec I./Kretschmer G. | 0:2 (2:6, 1:6) | details | 13.01.2015 | ||
| 1/8-finals | Klec I./Sikora A. | Dischinger E./Matos R. | 1:2 (2:6, 6:3, 7:10) | details | 22.09.2014 | ||
| 1/8-finals | Bagnis F./Schwartzman D. | Klec I./Sikora A. | 2:0 (6:1, 6:2) | details | 16.09.2014 | ||
| Quarter-finals | Chiudinelli M./Klec I. | Chen T./Huang L. C. | WO. | details | 17.07.2014 | ||
| 1/8-finals | Chiudinelli M./Klec I. | Kudryavtsev A./Matsukevich D. | 2:0 (6:3, 6:3) | details | 15.07.2014 | ||