Bulgaria: Sofia - Doubles - Main |
| Final | Hsieh C./Rungkat C. | Mektic N./Melzer J. | 1:2 (2:6, 6:4, 2:10) | details | 10.02.2019 |
| Semi-finals | Nedunchezhiyan J./Raja P. | Mektic N./Melzer J. | 1:2 (7:5, 4:6, 6:10) | details | 08.02.2019 |
| Quarter-finals | Mektic N./Melzer J. | Bolelli S./Seppi A. | 2:1 (65:7, 7:65, 10:6) | details | 07.02.2019 |
| 1/8-finals | Mektic N./Melzer J. | Gonzalez S./Qureshi A. | 2:0 (7:64, 7:5) | details | 06.02.2019 |
Russia: Moscow - Doubles - Main |
| Quarter-finals | Mirnyi M./Oswald P. | Mektic N./Melzer J. | 2:1 (4:6, 7:5, 13:11) | details | 18.10.2018 |
| 1/8-finals | Mektic N./Melzer J. | Molchanov D./Zelenay I. | 2:0 (6:2, 6:2) | details | 17.10.2018 |
USA: US Open - Doubles - Main |
| 1/8-finals | Mektic N./Melzer J. | Krajicek A./Sandgren T. | 0:2 (3:6, 4:6) | details | 02.09.2018 |
| 1/16-finals | Mayer L./Sousa J. | Mektic N./Melzer J. | 0:2 (3:6, 3:6) | details | 31.08.2018 |
| 1/32-finals | Gojowczyk P./Raja P. | Mektic N./Melzer J. | 0:2 (62:7, 4:6) | details | 29.08.2018 |