Stadium: C Round: 29
| ITF Portugal F20 | 2017/09/29 12:45 | Monteiro, Joao v Mertens, Yannick | 4-6,6-4,4-6 |
| ITF Portugal F20 | 2017/09/28 12:10 | Daniel Masur v Mertens, Yannick | 2-6,6-7 |
| ITF Portugal F20 | 2017/09/27 11:25 | Hubert Hurkacz v Mertens, Yannick | 4-6,1-6 |
| ITF Portugal F20 | 2017/09/26 09:00 | Kanar, Jonathan v Mertens, Yannick | 3-6,0-6 |
| ATP Metz Qual | 2017/09/18 11:30 | Gojowczyk, Peter v Mertens, Yannick | 6-3,6-4 |
| ATP Metz Qual | 2017/09/17 13:50 | Mertens, Yannick v Calvin Hemery | 7-5,6-1 |
| Istanbul, Turkey | 2017/09/12 11:15 | Mirza Basic v Mertens, Yannick | 3-6,6-3,7-5 |
| Challenger Istanbul Qual | 2017/09/10 08:00 | Mertens, Yannick v Dzhanashia, Shalva | 6-1,6-2 |
| ITF Portugal F20 | 2017/09/29 15:25 | Krstin, Pedja v Doumbia, Sadio | 6-1,6-1 |
| ITF Portugal F20 | 2017/09/28 14:35 | Mina, Gianni v Krstin, Pedja | 3-6,1-6 |
| ITF Portugal F20 | 2017/09/27 09:30 | Desein, Niels v Krstin, Pedja | 4-6,4-6 |
| ITF Portugal F20 | 2017/09/26 10:15 | Cabral, Francisco v Krstin, Pedja | 3-6,6-7 |
| St. Petersburg, Russia, Qualifying | 2017/09/17 08:00 | Nedelko, Ivan v Krstin, Pedja | 6-3,6-4 |
| Challenger Banja Luka | 2017/09/11 11:50 | Arnaboldi, Andrea v Krstin, Pedja | 5-7,6-1,6-3 |
| Challenger Alphen | 2017/09/05 15:00 | Krstin, Pedja v Sousa, Pedro | 4-6,6-4,2-6 |
| Challenger Tampere | 2017/07/25 09:30 | Krstin, Pedja v Sebastian Ofner | 7-6,5-7,4-6 |