Kilian Feldbausch (born 7 September 2005) is a Swiss tennis player.

[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.