Thiago Seyboth Wild, ranked 238 from Brazil, enters the Ostrava quarterfinals on clay seeking to build on a mixed recent run. The Brazilian has won three of his last five matches, including victories over Gombos and Miguel, though he suffered defeats to Aboian and Pellegrino. Seyboth Wild holds a 1–0 head-to-head advantage over opponent Nikola Fatic, giving him a slight edge in this first-round meeting. On clay courts, consistency will be crucial as he looks to advance further in the tournament.

Nikola Fatic, ranked 239 from Bosnia and Herzegovina, arrives at the Ostrava quarterfinals with equally competitive recent form, having won three of his last five matches. The Bosnian defeated Pinnington Jones and Tseng in straight sets, though he fell to Martin Tiffon and Jarry in his most recent outings. Fatic trails 0–1 in the head-to-head record against Seyboth Wild but enters as a closely matched opponent at similar ranking strength. His success on clay will be tested against a familiar rival in this competitive quarterfinal encounter.