# Alex Knaff

Alex Knaff (born 26 November 1997) is a Luxembourgish tennis player.
Knaff has a career high ATP singles ranking of 486 achieved on 11 September 2023. He also has a career high ATP doubles ranking of 364 achieved on 11 September 2023.
Knaff represents Luxembourg at the Davis Cup since 2015, where he has a W/L record of 12–10.
Knaff played college tennis at Florida State University.

## Future and Challenger finals
### Singles 4 (2–2)

* Legend (singles)
* ITF Futures Tour (2–2)
* Titles by surface
* Hard (1–2)
* Clay (1–0)
* Grass (0–0)
* Carpet (0–0)
| Result | W–L | Date | Tournament | Tier | Surface | Opponent | Score |
| Loss | 0–1 | May 2022 | Mexico M15, Cancun | World Tennis Tour | Hard | Brandon Holt | 1–6, 2–6 |
| Win | 1–1 | Oct 2022 | USA M15, Tallahassee | World Tennis Tour | Hard | William Grant | 6–3, 6–0 |
| Win | 2–1 | July 2023 | Luxembourg M25, Esch-sur-Alzette | World Tennis Tour | Clay | Marlon Vankan | 6–3, 6–1 |
| Loss | 2–2 | October 2023 | Egypt M15, Sharm El Sheikh | World Tennis Tour | Hard | Mohamed Safwat | 4–6, 4–6 |

### Doubles 14 (7–7)

* Legend (doubles)
* ITF Futures Tour (7–6)
* Titles by surface
* Hard (2–5)
* Clay (4–1)
* Grass (0–0)
* Carpet (0–0)
| Result | W–L | Date | Tournament | Tier | Surface | Partner | Opponents | Score |
| Loss | 0–1 | Nov 2021 | United States M15, Ithaca | World Tennis Tour | Hard | Joshua Peck | Vasil Kirkov Luke Johnson | 6–7$^{(3–7)}$, 3–6 |
| Loss | 0–2 | Mar 2022 | Tunisia M15, Monastir | World Tennis Tour | Hard | Aziz Dougaz | Hanwen Li Mateo Nicolas Martinez | 1–6, 6–2, 8-10 |
| Win | 1–2 | Mar 2022 | Tunisia M15, Monastir | World Tennis Tour | Hard | Aziz Dougaz | Tomohiro Masabayashi Ren Nakamura | 6–2, 6–4 |
| Loss | 1-3 | Apr 2022 | United States M15, Sunrise | World Tennis Tour | Clay | Alec Deckers | Alexander Cozbinov Ruan Roelofse | 4–6, 4–6 |
| Win | 2-3 | Jun 2022 | Belgium M15, Duffel | World Tennis Tour | Clay | Chris Rodesch | Franco Emanuel Egea Marcelo Zormann | 6–1, 6–4 |
| Win | 3-3 | Jul 2022 | Luxembourg M25, Esch-sur-Alzette | World Tennis Tour | Clay | Chris Rodesch | Raphael Calzi Marlon Vankan | 6–1, 6–4 |
| Win | 4-3 | Jan 2023 | Manacor M25, Manacor | World Tennis Tour | Hard | Filip Bergevi | Alberto Barroso Campos Imanol López Morillo | 3–6, 6–3, 16-14 |
| Loss | 4-4 | Mar 2023 | Sharm El Sheikh M15, Sharm El Sheikh | World Tennis Tour | Hard | Jakob Schnaitter | Lukas Pokorny Saba Purtseladze | 3–4, 4–6 |
| Loss | 4-5 | Mar 2023 | Sharm El Sheikh M15, Sharm El Sheikh | World Tennis Tour | Hard | Jakob Schnaitter | Alec Beckley Petr Nesterov | 6-3, 3-6, 8-10 |
| Win | 5-5 | May 2023 | Pazardzhik M15, Pazardzhik | World Tennis Tour | Clay | Corentin Denolly | Riccardo Balzerani Artsiom Sinitsyn | 6-0, 6-0 |
| Win | 6-5 | July 2023 | Luxembourg M25, Esch-sur-Alzette | World Tennis Tour | Clay | Chris Rodesch | Dimitris Sakellaridis Stefanos Sakellaridis | 6-3, 6-4 |
| Win | 7-5 | July 2023 | Luxembourg M25, Esch-sur-Alzette | World Tennis Tour | Clay | David Pichler | Dimitris Sakellaridis Stefanos Sakellaridis | 1-6, 6-1, 12-10 |
| Loss | 7-6 | Feb 2024 | Villena M15, Villena | World Tennis Tour | Hard | Adrià Soriano Barrera | Liam Gavrielides Alejo Sanchez Quilez | 2-6, 4-6 |
| Loss | 7-7 | Mar 2024 | Torello M15, Torello | World Tennis Tour | Hard | Niklas Schell | James Davis Giles Hussey | 1-6, 2-6 |