Kilian Feldbausch (born 7 September 2005) is a Swiss tennis player. He has a career-high ATP singles rankings of world No. 409, achieved on 19 February 2024, and a career-high doubles ranking of No. 1665, achieved on 15 August 2022.

He is the son of former tennis player Cathy Caverzasio.^[1]

He featured in a professional tennis tournament in Biel, Switzerland in March 2021, at age 15.^[2]

Feldbausch became the first Swiss player since Roger Federer in 1998 to reach the semifinals of the junior Australian Open.^[3][4][5] He also reached the semifinals of the doubles, partnering Gabriel Debru.^[6] Kilian Feldbausch won his first 3 ATP points after reaching the semifinals of the M25 Futures in Trimbach, Switzerland. ^[7] He further reached the round of 16 at the Challenger Biel/Bienne, after beating the 7th seed Marc-Andrea Hüsler in the first round in straight sets. He then lost 7-6 7-6 in the second round to Filip Horansky.

Result	W–L	Date	Tournament	Tier	Surface	Opponent	Score
Loss	0–1	Dec 2023	Maspalomas, Spain	Challenger	Clay	Pedro Martínez	4–6, 6–4, 3–6

Result	W–L	Date	Tournament	Tier	Surface	Opponent	Score
Win	1–0	Nov 2023	M15 Boca Raton, USA	WTT	Clay	Garrett Johns	6–4, 7–5
Win	2–0	Dec 2024	M15 Antalya, Turkiye	WTT	Clay	Evgenii Tiurnev	6–3, 6–4

• Kilian Feldbausch at the Association of Tennis Professionals
• Kilian Feldbausch at the International Tennis Federation