ATP Player Stats - Jan-Lennard Struff
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| St. Petersburg Open | ||
| Surface: Hard | Date: Sep. 17 - Sep. 23 | Seed: None |
| Round | Opponent | W / L | Result |
| First Round | Andrey Rublev | Win | 6-4, 7-6 (8-6) |
| Second Round | Dominic Thiem | Loss | 6-7 (4-7), 4-6 |
| US Open | ||
| Surface: Hard | Date: Aug. 27 - Sep. 9 | Seed: None |
| Round | Opponent | W / L | Result |
| First Round | Tim Smyczek | Win | 7-6 (7-2), 6-4, 6-3 |
| Second Round | Julien Benneteau | Win | 6-2, 4-6, 6-1, 3-6, 6-3 |
| Third Round | David Goffin | Loss | 4-6, 1-6, 6-7 (4-7) |
| Winston-Salem Open | ||
| Surface: Hard | Date: Aug. 19 - Aug. 25 | Seed: None |
| Round | Opponent | W / L | Result |
| First Round | Benoit Paire | Win | 7-6 (7-5), 6-3 |
| Second Round | Marco Cecchinato | Win | 6-3, 6-4 |
| Third Round | Nicolas Jarry | Loss | 2-6, 2-6 |
| Generali Open | ||
| Surface: Clay | Date: Jul. 30 - Aug. 4 | Seed: 7 |
| Round | Opponent | W / L | Result |
| First Round | Taro Daniel | Loss | 6-7 (3-7), 1-6 |
| German Tennis Championships | ||
| Surface: Red Clay | Date: Jul. 23 - Jul. 29 | Seed: None |
| Round | Opponent | W / L | Result |
| First Round | John Millman | Loss | 5-7, 3-6 |
| Wimbledon | ||
| Surface: Grass | Date: Jul. 2 - Jul. 15 | Seed: None |
| Round | Opponent | W / L | Result |
| First Round | Leonardo Mayer | Win | 3-6, 6-7 (5-7), 7-6 (7-5), 7-6(7-5), 6-1 |
| Second Round | Ivo Karlovic | Win | 6-7 (5-7), 3-6, 7-6 (7-4), 7-6(7-4), 13-11 |
| Third Round | Roger Federer | Loss | 3-6, 5-7, 2-6 |
| Gerry Weber Open | ||
| Surface: Grass | Date: Jun. 18 - Jun. 24 | Seed: None |
| Round | Opponent | W / L | Result |
| First Round | Roberto Bautista Agut | Loss | 4-6, 1-6 |
| MercedesCup | ||
| Surface: Grass | Date: Jun. 11 - Jun. 17 | Seed: None |
| Round | Opponent | W / L | Result |
| First Round | Rudolf Molleker | Loss | 4-6, 7-6 (7-5), 3-6 |
| Roland Garros | ||
| Surface: Red Clay | Date: May 27 - Jun. 10 | Seed: None |
| Round | Opponent | W / L | Result |
| First Round | Evgeny Donskoy | Win | 6-1, 6-3, 6-0 |
| Second Round | Steve Johnson | Loss | 6-4, 6-7 (5-7), 2-6, 2-6 |
| Mutua Madrid Open | ||
| Surface: Red Clay | Date: May 5 - May 13 | Seed: None |
| Round | Opponent | W / L | Result |
| First Round | Marius Copil | Win | 6-4, 6-4 |
| Second Round | Borna Coric | Loss | 0-6, 2-6 |
| BMW Open by FWU | ||
| Surface: Red Clay | Date: Apr. 30 - May 6 | Seed: None |
| Round | Opponent | W / L | Result |
| First Round | Daniel Masur | Win | 7-6 (7-1), 6-4 |
| Second Round | Yannick Maden | Win | 6-3, 3-6, 6-3 |
| Quarterfinals | Alexander Zverev | Loss | 3-6, 2-6 |
| Gazprom Hungarian Open | ||
| Surface: Red Clay | Date: Apr. 23 - Apr. 29 | Seed: 7 |
| Round | Opponent | W / L | Result |
| First Round | Jurgen Zopp | Win | 2-6, 6-4, 7-5 |
| Second Round | Alexander Bublik | Win | 6-1, 6-4 |
| Quarterfinals | Marco Cecchinato | Loss | 7-5, 4-6, 2-6 |
| Monte-Carlo Rolex Masters | ||
| Surface: Clay | Date: Apr. 15 - Apr. 22 | Seed: None |
| Round | Opponent | W / L | Result |
| First Round | Yuichi Sugita | Win | 6-3, 6-2 |
| Second Round | Fabio Fognini | Win | 6-4, 6-2 |
| Third Round | Alexander Zverev | Loss | 4-6, 6-4, 4-6 |
| Grand Prix Hassan II | ||
| Surface: Red Clay | Date: Apr. 9 - Apr. 15 | Seed: None |
| Round | Opponent | W / L | Result |
| First Round | Alexey Vatutin | Loss | 6-3, 3-6, 2-6 |
| Miami Open presented by Itau | ||
| Surface: Hard | Date: Mar. 20 - Apr. 1 | Seed: None |
| Round | Opponent | W / L | Result |
| First Round | Mikael Ymer | Loss | 6-3, 5-7, 1-6 |
| BNP Paribas Open | ||
| Surface: Hard | Date: Mar. 7 - Mar. 18 | Seed: None |
| Round | Opponent | W / L | Result |
| First Round | Alex De Minaur | Loss | 6-3, 6-7 (3-7), 6-7 (5-7) |
| Dubai Duty Free Tennis Championships | ||
| Surface: Hard | Date: Feb. 26 - Mar. 3 | Seed: None |
| Round | Opponent | W / L | Result |
| First Round | Andreas Haider-Maurer | Win | 6-2, 6-4 |
| Second Round | Yuichi Sugita | Loss | 6-7 (4-7), 4-6 |
| ABN AMRO World Tennis Tournament | ||
| Surface: Hard | Date: Feb. 12 - Feb. 18 | Seed: None |
| Round | Opponent | W / L | Result |
| First Round | Viktor Troicki | Loss | 6-1, 6-7 (5-7), 2-6 |
| Australian Open | ||
| Surface: Hard | Date: Jan. 15 - Jan. 28 | Seed: None |
| Round | Opponent | W / L | Result |
| First Round | Soon Woo Kwon | Win | 6-1, 6-2, 6-4 |
| Second Round | Roger Federer | Loss | 4-6, 4-6, 6-7 (4-7) |
| Sydney International | ||
| Surface: Hard | Date: Jan. 7 - Jan. 13 | Seed: None |
| Round | Opponent | W / L | Result |
| First Round | Damir Dzumhur | Loss | 1-6, 4-6 |
| Qatar ExxonMobil Open | ||
| Surface: Hard | Date: Jan. 1 - Jan. 6 | Seed: None |
| Round | Opponent | W / L | Result |
| First Round | Tomas Berdych | Win | 6-4, 1-6, 7-6 (7-4) |
| Second Round | Gael Monfils | Loss | 3-6, 6-1, 3-6 |
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