: Matteo Berrettini , a 2019 semi-finalist, fell to Alex de Minaur in a competitive second-set tiebreak. Meanwhile, Lorenzo Musetti secured his semi-final spot by overcoming the unorthodox style of Corentin Moutet .

: Second-seeded Alexander Zverev advanced to the semi-finals after Tallon Griekspoor was forced to withdraw before their match.

Sinner notches fastest win of 2025 in Vienna opener - ATP Tour

The following matches took place at the to determine the final four: QF 1 [1] Jannik Sinner (ITA) [8] Alexander Bublik (KAZ) QF 2 [2] Alexander Zverev (GER) Tallon Griekspoor (NED) Walkover (W/O) QF 3 [3] Alex de Minaur (AUS) Matteo Berrettini (ITA) 6-1, 7-6(4) QF 4 [4] Lorenzo Musetti (ITA) Corentin Moutet (FRA) Key Highlights