Alex Knaff

Alex Knaff
Country (sports)	Luxembourg
Born	26 November 1997 (age 28); Luxembourg City, Luxembourg
Height	1.93 m (6 ft 4 in)
Plays	Right-handed (two-handed backhand)
College	Florida State
Coach	Gilles Müller
Prize money	US $81,288
Singles
Career record	9–7 (at ATP Tour level, Grand Slam level, and in Davis Cup)
Career titles	0 ; 0 Challenger, 2 Futures
Highest ranking	No. 486 (11 September 2023)
Current ranking	No. 761 (14 September 2026)
Doubles
Career record	3–3 (at ATP Tour level, Grand Slam level, and in Davis Cup)
Career titles	0 ; 0 Challenger, 7 Futures
Highest ranking	No. 364 (11 September 2023)
Current ranking	No. 1,489 (14 September 2026)
	Last updated on: 18 September 2026.

Alex Knaff (born 26 November 1997) is a Luxembourgish tennis player. He has a career high ATP singles ranking of No. 486 achieved on 11 September 2023 and a career high ATP doubles ranking of No. 364 achieved on 11 September 2023.

Tennis career

Knaff played college tennis at Florida State University.

Knaff won his first ITF title in his college town in 2022. He represented Luxembourg at the Davis Cup since 2015, where he has a W/L record of 12–10.

Future and Challenger finals

Singles 4 (3-3)

Legend (singles)
ITF Futures Tour (3-3)

Titles by surface
Hard (2–3)
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
Win	3–2	March 2025	Thailand M15, Nonthaburi	World Tennis Tour	Hard	Petr Bar Biryukov	6-1, 7-6^(7–3)
Loss	3-3	March 2025	Thailand M15, Nonthaburi	World Tennis Tour	Hard	Etienne Donnet	4–6, 2–6

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	Lukáš Pokorný 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