Mika Brunold (born 2 October 2004) is a Swiss tennis player. He has a career high ATP singles ranking of world No. 289 achieved on 18 August 2025.
Following a quarterfinal berth on his debut in a Challenger main draw in Lugano as a wildcard, Brunold reached the top 750 after a rise of more than 150 positions to world No. 725 on 20 March 2023. Brunold made his ATP main draw doubles debut at the 2023 Swiss Open Gstaad after receiving a wildcard into the doubles main draw with Kilian Feldbausch. He also received a wildcard for the qualifying competition of the 2023 Swiss Indoors in singles and for the main draw in doubles with Marc-Andrea Hüsler.
He received a wildcard for the 2024 Swiss Indoors qualifying competition, where he lost to James Duckworth. He received a wildcard for the 2025 Swiss Indoors qualifying competition, but lost to Reilly Opelka, unable to capitalize on six match points.
In November 2025, Brunold came out as gay in a post on his Instagram account.