(UPDATED 17 JANUARY 2026)
- Achieved career-high No. 15 in August 2024, joining Petr Korda (No. 2 in 1998) to become only father-son duo to rank inside Top 20 in PIF ATP Rankings history (since 1973).
- Did not drop a set en route to 2021 Parma title and captured 2024 Washington title, 32 years after his father, Petr, won in 1992, becoming 1st father-son duo to win the same ATP Tour event.
- Earned biggest wins of career en route to ATP Masters 1000 SFs over No. 3 Medvedev at 2023 Shanghai and No. 4 Zverev at 2024 Montreal.
- Advanced to 2020 Roland Garros 4R as Q and 2021 Wimbledon 4R, becoming 3rd men’s player in Open Era to reach 4R in debut at both events (Borg in 1973, Pernfors in 1986).
- Became World No. 1 junior by winning 2018 Australian Open boys’ singles title 20 years after his father won Australian Open men's singles title.
- Father, Petr, peaked at No. 2 on ATP Tour; mother, Regina, peaked at No. 26 in WTA; sister, Nelly, became World No. 1 women’s golfer in 2021; sister, Jessica, peaked at No. 8 in women’s golf.