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Davis Сup Group I Tennis. Played Struff Jan-Lennard. Season 2025
Country 
Germany. Ranking ATP 100.
Germany. Ranking ATP 100. ATP - Athens | ||||
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| 03.11.2025 | First round | Muller Alexandre — Struff Jan-Lennard | 2:1 (6:3, 2:6, 7:6) |
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| 02.11.2025 | Qialification final | Struff Jan-Lennard — Bernet Henry | 2:1 (4:6, 6:4, 6:3) |
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| 01.11.2025 | Qualifications - 1st round | Struff Jan-Lennard — Lajal Mark | 2:0 (7:6, 7:5) |
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 Bratislava $114K | ||||
| 27.10.2025 | First round | Struff Jan-Lennard — Blockx Alexander | 1:2 (6:3, 4:6, 6:7) |
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 ATP - Astana | ||||
| 17.10.2025 | Quarter-finals | Struff Jan-Lennard — Moutet Corentin | 0:2 (4:6, 5:7) |
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| 16.10.2025 | Second round | Khachanov Karen — Struff Jan-Lennard | 1:2 (6:4, 6:7, 3:6) |
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| 15.10.2025 | First round | Struff Jan-Lennard — Mcdonald Mackenzie | 2:1 (2:6, 6:3, 6:4) |
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 Roanne | ||||
| 08.10.2025 | First round | Sakellaridis Stefanos — Struff Jan-Lennard | 2:1 (3:6, 7:6, 7:5) |
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| 07.10.2025 | First round | Kypson Patrick — Struff Jan-Lennard | — — |
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 Villena | ||||
| 30.09.2025 | First round | Struff Jan-Lennard — Butvilas Edas | 0:2 (4:6, 2:6) |
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 ATP - US Open | ||||
| 01.09.2025 | 4th Round | Djokovic Novak — Struff Jan-Lennard | 3:0 (6:3, 6:3, 6:2) |
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| 29.08.2025 | Third round | Tiafoe Frances — Struff Jan-Lennard | 0:3 (4:6, 3:6, 6:7) |
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| 28.08.2025 | Second round | Struff Jan-Lennard — Rune Holger | 3:2 (7:6, 2:6, 6:3, 4:6, 7:5) |
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| 25.08.2025 | First round | Struff Jan-Lennard — Mcdonald Mackenzie | 3:1 (3:6, 7:6, 6:3, 6:3) |
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| 22.08.2025 | Qialification final | Cazaux Arthur — Struff Jan-Lennard | 0:2 (6:7, 3:6) |
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| 21.08.2025 | Qualifications - 2nd round | Daniel Taro — Struff Jan-Lennard | 1:2 (6:2, 4:6, 1:6) |
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| 18.08.2025 | Qualifications - 1st round | Chidekh Clement — Struff Jan-Lennard | 0:2 (4:6, 1:6) |
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 Cancun | ||||
| 13.08.2025 | First round | Hanfmann Yannick — Struff Jan-Lennard | 2:1 (3:6, 7:5, 6:1) |
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| ATP - Western & Southern Financial Group Masters | ||||
| 06.08.2025 | Qualifications - 1st round | Navone Mariano — Struff Jan-Lennard | 2:1 (6:7, 6:2, 6:4) |
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 ATP - Generali Open - Kitzbuhel | ||||
| 24.07.2025 | Quarter-finals | Cazaux Arthur — Struff Jan-Lennard | 2:0 (6:3, 6:4) |
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| 23.07.2025 | Second round | Struff Jan-Lennard — Martinez Portero Pedro | 2:0 (6:2, 6:2) |
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| 22.07.2025 | First round | Struff Jan-Lennard — Ofner Sebastian | 2:0 (6:4, 6:2) |
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| 20.07.2025 | Qialification final | Struff Jan-Lennard — Rodionov Jurij | 2:0 (6:3, 7:6) |
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 ATP - Allianz Suisse Open | ||||
| 15.07.2025 | First round | Cerundolo Juan Manuel — Struff Jan-Lennard | 2:1 (6:3, 3:6, 6:3) |
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 ATP - Wimbledon | ||||
| 04.07.2025 | Third round | Struff Jan-Lennard — Alcaraz Carlos | 1:3 (1:6, 6:3, 3:6, 4:6) |
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| 03.07.2025 | Second round | Auger Aliassime Felix — Struff Jan-Lennard | 1:3 (6:3, 6:7, 3:6, 4:6) |
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| 30.06.2025 | First round | Struff Jan-Lennard — Misolic Filip | 3:1 (6:2, 5:7, 6:3, 6:3) |
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| ATP - Gerry Weber Open | ||||
| 17.06.2025 | First round | Sonego Lorenzo — Struff Jan-Lennard | 2:0 (6:3, 6:2) |
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| ATP - Mercedes Cup | ||||
| 11.06.2025 | Second round | Lehecka Jiri — Struff Jan-Lennard | 2:0 (6:4, 7:5) |
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| 09.06.2025 | First round | Arnaldi Matteo — Struff Jan-Lennard | 0:2 (4:6, 4:6) |
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| Lyon | ||||
| 15.11.2025 | Final | Broady Liam — Struff Jan-Lennard | 0:2 (4:6, 4:6) |
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| 14.11.2025 | Semi-finals | Added Dan — Struff Jan-Lennard | 1:2 (6:1, 6:7, 2:6) |
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| 13.11.2025 | Quarter-finals | Struff Jan-Lennard — Kopriva Vit | 2:0 (6:1, 6:2) |
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| 12.11.2025 | Second round | Struff Jan-Lennard — Lajal Mark | 2:0 (6:4, 6:2) |
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| 11.11.2025 | First round | Struff Jan-Lennard — Zhukayev Beibit | 2:1 (6:7, 7:6, 6:4) |
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| ATP - French Open | ||||
| 26.05.2025 | First round | Ofner Sebastian — Struff Jan-Lennard | 3:1 (7:6, 6:3, 6:7, 6:2) |
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 ATP - Internazionali BNL d'Italia - Rome | ||||
| 07.05.2025 | First round | Nishioka Yoshihito — Struff Jan-Lennard | — — |
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 Estoril | ||||
| 30.04.2025 | First round | Kecmanovic Miomir — Struff Jan-Lennard | 2:0 (6:1, 7:5) |
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| ATP - Masters Series Madrid | ||||
| 26.04.2025 | Second round | Tsitsipas Stefanos — Struff Jan-Lennard | 2:1 (3:6, 6:4, 6:3) |
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| 24.04.2025 | First round | Struff Jan-Lennard — Van De Zandschulp Botic (Retired) | 1:1 (7:5, 2:6, 4:1) |
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| ATP - BMW Open | ||||
| 15.04.2025 | First round | Cerundolo Francisco — Struff Jan-Lennard | 2:0 (6:0, 6:2) |
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 ATP - Masters Series Monte-Carlo | ||||
| 06.04.2025 | First round | Struff Jan-Lennard — Vacherot Valentin | 0:2 (2:6, 1:6) |
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| ATP - NASDAQ-100 | ||||
| 20.03.2025 | First round | Struff Jan-Lennard — Davidovich Fokina Alejandro | 0:2 (6:7, 3:6) |
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| Phoenix | ||||
| 14.03.2025 | Second round | Fonseca Joao — Struff Jan-Lennard | 2:1 (6:1, 4:6, 6:3) |
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| ATP - Pacific Life Open | ||||
| 07.03.2025 | First round | Struff Jan-Lennard — Monfils Gael | 0:2 (4:6, 4:6) |
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 ATP - The Dubai Tennis Championships | ||||
| 25.02.2025 | First round | Medvedev Daniil — Struff Jan-Lennard | 2:0 (6:4, 7:6) |
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 ATP - Qatar ExxonMobil Open | ||||
| 18.02.2025 | First round | Struff Jan-Lennard — Griekspoor Tallon | 0:2 (6:7, 6:7) |
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| ATP - Open 13 | ||||
| 14.02.2025 | Quarter-finals | Medvedev Daniil — Struff Jan-Lennard | 2:0 (6:3, 6:2) |
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| 13.02.2025 | Second round | Struff Jan-Lennard — Grenier Hugo | 2:1 (6:4, 5:7, 6:4) |
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| 11.02.2025 | First round | Struff Jan-Lennard — Guinard Manuel | 2:0 (7:5, 7:6) |
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 ATP - ABN/AMRO World Tennis Tournament | ||||
| 05.02.2025 | First round | Struff Jan-Lennard — Marozsan Fabian | 1:2 (3:6, 6:4, 6:7) |
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 ATP - Heineken Open | ||||
| 08.01.2025 | Second round | Struff Jan-Lennard — Monfils Gael | 0:2 (1:6, 6:7) |
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| 07.01.2025 | First round | Struff Jan-Lennard — Yunchaokete Bu | 2:0 (6:3, 6:4) |
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