Tomáš Macháč (Czech pronunciation: [ˈtomaːʃ ˈmaxaːtʃ]; born 13 October 2000) is a Czech professional tennis player. He achieved his career-high ATP singles ranking of world No. 25 on 14 October 2024 and doubles ranking of No. 46 on 30 September 2024.
He is currently the No. 1 Czech player. He won the Mixed Doubles title with Kateřina Siniaková at the 2024 Paris Olympics.