Stéfanos Tsitsipás defeated Dominic Thiem 7–6, 6–4 at the ATP 250 Vienna tournament on the hard court in the first round on 24 October 2023, confirming his pre-match status as favourite. Tsitsipás's victory came against odds of 1.33 to 3.62, a result that aligned with expectations given the Greek player's seeding advantage and recent form. The match remained competitive in the opening set, decided in a tiebreak, before Tsitsipás secured the second set with a decisive break to close out the encounter. The win maintains Tsitsipás's momentum in the latter stages of the ATP calendar and positions him favourably for the tournament's subsequent rounds.