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| German Tennis Championships | ||
| Surface: Red Clay | Date: Jul. 23 - Jul. 29 | Seed: None |
| Round | Opponent | W / L | Result |
| First Round | Marton Fucsovics | Win | 6-3, 6-2 |
| Second Round | Nikoloz Basilashvili | Loss | 6-7 (6-8), 4-6 |
| Plava Laguna Croatia Open Umag | ||
| Surface: Clay | Date: Jul. 16 - Jul. 22 | Seed: None |
| Round | Opponent | W / L | Result |
| First Round | Laslo Djere | Loss | 4-6, 6-1, 3-6 |
| Wimbledon | ||
| Surface: Grass | Date: Jul. 2 - Jul. 15 | Seed: None |
| Round | Opponent | W / L | Result |
| First Round | Simone Bolelli | Loss | 6-7 (5-7), 6-7 (6-8), 1-6 |
| Roland Garros | ||
| Surface: Red Clay | Date: May 27 - Jun. 10 | Seed: None |
| Round | Opponent | W / L | Result |
| First Round | Aljaz Bedene | Win | 6-4, 6-3, 6-2 |
| Second Round | Kevin Anderson | Loss | 3-6, 6-3, 6-7 (5-7), 4-6 |
| Internazionali BNL d'Italia | ||
| Surface: Red Clay | Date: May 13 - May 20 | Seed: None |
| Round | Opponent | W / L | Result |
| First Round | Marco Cecchinato | Loss | 6-2, 5-7, 4-6 |
| Mutua Madrid Open | ||
| Surface: Red Clay | Date: May 5 - May 13 | Seed: None |
| Round | Opponent | W / L | Result |
| First Round | Jack Sock | Win | 6-7 (5-7), 6-4, 6-0 |
| Second Round | Albert Ramos-Vinolas | Win | 6-1, 6-7 (2-7), 6-2 |
| Third Round | John Isner | Loss | 7-6 (11-9), 6-7 (3-7), 6-7 (4-7) |
| Barcelona Open Banco Sabadell | ||
| Surface: Clay | Date: Apr. 23 - Apr. 29 | Seed: None |
| Round | Opponent | W / L | Result |
| First Round | Ricardo Ojeda Lara | Win | 6-0, 6-4 |
| Second Round | Adrian Mannarino | Loss | 4-6, 6-7 (5-7) |
| Monte-Carlo Rolex Masters | ||
| Surface: Clay | Date: Apr. 15 - Apr. 22 | Seed: None |
| Round | Opponent | W / L | Result |
| First Round | Fernando Verdasco | Loss | 7-5, 6-7 (4-7), 1-6 |
| BNP Paribas Open | ||
| Surface: Hard | Date: Mar. 7 - Mar. 18 | Seed: 30 |
| Round | Opponent | W / L | Result |
| First Round | Bye | ||
| Second Round | Denis Shapovalov | Win | 7-6 (7-4), 6-3 |
| Third Round | Dominic Thiem | Win | 3-6, 6-4, 4-2 Retired |
| Fourth Round | Hyeon Chung | Loss | 1-6, 3-6 |
| Brasil Open | ||
| Surface: Clay | Date: Feb. 26 - Mar. 4 | Seed: 3 |
| Round | Opponent | W / L | Result |
| First Round | Bye | ||
| Second Round | Sebastian Ofner | Win | 6-4, 7-6 (7-4) |
| Quarterfinals | Leonardo Mayer | Win | 6-2, 6-7 (13-15), 7-6 (7-5) |
| Semifinals | Fabio Fognini | Loss | 4-6, 2-6 |
| Rio Open presented by Claro HDTV | ||
| Surface: Clay | Date: Feb. 19 - Feb. 25 | Seed: 7 |
| Round | Opponent | W / L | Result |
| First Round | Thiago Monteiro | Win | 6-7 (5-7), 7-6 (12-10), 6-3 |
| Second Round | Gastao Elias | Win | 7-5, 6-1 |
| Quarterfinals | Nicolas Jarry | Loss | 5-7, 3-6 |
| Argentina Open | ||
| Surface: Clay | Date: Feb. 12 - Feb. 18 | Seed: 7 |
| Round | Opponent | W / L | Result |
| First Round | Gael Monfils | Loss | 1-6, 4-6 |
| Australian Open | ||
| Surface: Hard | Date: Jan. 15 - Jan. 28 | Seed: 31 |
| Round | Opponent | W / L | Result |
| First Round | Mikhail Youzhny | Win | 7-6 (9-7), 6-3, 7-5 |
| Second Round | Ryan Harrison | Loss | 4-6, 6-7 (5-7), 4-6 |
| ASB Classic | ||
| Surface: Hard | Date: Jan. 1 - Jan. 13 | Seed: 6 |
| Round | Opponent | W / L | Result |
| First Round | Taro Daniel | Win | 6-3, 6-2 |
| Second Round | Karen Khachanov | Loss | 2-6, 6-7 (4-7) |
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