Chengdu 
Tokyo 
Astana 
Caldas da Rainha 
Seoul 
Villa Maria 
Davis Сup Group I Tennis. Played Struff Jan-Lennard. Season 2020
Country 
Germany. Ranking ATP 152.
Germany. Ranking ATP 152. ATP - Garanti Koza Sofia Open | ||||
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| 10.11.2020 | Second round | Pospisil Vasek — Struff Jan-Lennard | 2:0 (6:3, 6:4) |
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 ATP - BNP Paribas Masters | ||||
| 03.11.2020 | Second round | Carreno-Busta Pablo — Struff Jan-Lennard | 2:0 (7:6, 6:2) |
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| 02.11.2020 | First round | Basilashvili Nikoloz — Struff Jan-Lennard | 0:2 (4:6, 2:6) |
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 ATP - BA-CA Tennis Trophy | ||||
| 28.10.2020 | First round | Tsitsipas Stefanos — Struff Jan-Lennard | 2:1 (6:7, 6:3, 6:4) |
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| ATP - bett1HULKS Championships - Cologne | ||||
| 22.10.2020 | Second round | Struff Jan-Lennard — Nishioka Yoshihito | 1:2 (6:2, 3:6, 6:7) |
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| 21.10.2020 | First round | Struff Jan-Lennard — Cecchinato Marco | 2:0 (6:3, 6:1) |
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| ATP - Cologne | ||||
| 12.10.2020 | First round | Struff Jan-Lennard — Otte Oscar | 0:2 (4:6, 3:6) |
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| ATP - French Open | ||||
| 01.10.2020 | Second round | Struff Jan-Lennard — Altmaier Daniel | 0:3 (3:6, 6:7, 3:6) |
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| 28.09.2020 | First round | Struff Jan-Lennard — Tiafoe Frances | 3:2 (3:6, 7:6, 6:3, 6:7, 6:3) |
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| ATP - Masters Series Hamburg | ||||
| 22.09.2020 | First round | Khachanov Karen — Struff Jan-Lennard | 2:1 (7:6, 4:6, 7:5) |
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 ATP - Internazionali BNL d'Italia - Rome | ||||
| 15.09.2020 | First round | Struff Jan-Lennard — Coria Federico | 0:2 (1:6, 6:7) |
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 ATP - US Open | ||||
| 05.09.2020 | Third round | Djokovic Novak — Struff Jan-Lennard | 3:0 (6:3, 6:3, 6:1) |
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| 02.09.2020 | Second round | Mmoh Michael — Struff Jan-Lennard | 0:3 (2:6, 2:6, 5:7) |
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| 01.09.2020 | First round | Martinez Portero Pedro — Struff Jan-Lennard | 0:3 (0:6, 5:7, 4:6) |
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| ATP - Western & Southern Financial Group Masters | ||||
| 26.08.2020 | Quarter-finals | Djokovic Novak — Struff Jan-Lennard | 2:0 (6:3, 6:1) |
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| 25.08.2020 | Third round | Struff Jan-Lennard — Goffin David | 2:1 (6:4, 3:6, 6:4) |
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| 24.08.2020 | Second round | Struff Jan-Lennard — Shapovalov Denis | 2:1 (7:6, 3:6, 6:4) |
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| 22.08.2020 | First round | Struff Jan-Lennard — De Minaur Alex | 2:0 (6:2, 6:4) |
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 ATP - The Dubai Tennis Championships | ||||
| 27.02.2020 | Quarter-finals | Struff Jan-Lennard — Tsitsipas Stefanos | 1:2 (6:4, 4:6, 4:6) |
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| 26.02.2020 | Second round | Struff Jan-Lennard — Basilashvili Nikoloz | 2:0 (6:1, 6:0) |
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| 25.02.2020 | First round | Bautista Agut Roberto — Struff Jan-Lennard | 0:2 (6:7, 5:7) |
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 ATP - ABN/AMRO World Tennis Tournament | ||||
| 11.02.2020 | First round | Auger Aliassime Felix — Struff Jan-Lennard | 2:1 (6:3, 1:6, 6:3) |
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 ATP - Australian Open | ||||
| 20.01.2020 | First round | Struff Jan-Lennard — Djokovic Novak | 1:3 (6:7, 2:6, 6:2, 1:6) |
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| ATP - Next Generation Adelaide International | ||||
| 15.01.2020 | Second round | Struff Jan-Lennard — Bolt Alex | 0:2 (3:6, 4:6) |
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| 14.01.2020 | First round | Struff Jan-Lennard — Caruso Salvatore | 2:0 (6:4, 6:2) |
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| ATP Cup | ||||
| 07.01.2020 | Struff Jan-Lennard — Auger Aliassime Felix | 2:0 (6:1, 6:4) |
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| 05.01.2020 | Struff Jan-Lennard — Pervolarakis Michail | 2:0 (6:4, 6:1) |
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| 03.01.2020 | Struff Jan-Lennard — Kyrgios Nick | 0:2 (4:6, 6:7) |
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