Dominic Thiem battled his way into the quarter-finals of the Austrian Open at the expense of compatriot Sebastian Ofner on Wednesday.
Thiem reached his first semi-final since May 2021 at the Swiss Open last week and is looking to make further strides on home soil this week, having endured an injury nightmare.
The 2020 US Open champion made it through to the last eight in Kitzbuhel but had to dig deep for a 6-2 3-6 6-3 victory over qualifier Ofner.
Thiem only lost one point in the opening two games and wrapped up the first set in commanding fashion, but Ofner claimed the only break of the second set to force a decider.
The former world number three twice came from a break down in the final set to ensure he will face Yannick Hanfmann for a place in the semi-finals.
Seeds Aslan Karatsev and Joao Sousa bowed out, losing to Dusan Lajovic and Jiri Lehecka respectively.
Spanish trio Roberto Bautista Agut, Albert Ramos-Vinolas and Pedro Martinez advanced in straight sets.
Two of the top five seeds were knocked out of the Croatia Open, with Holger Rune and Alex Molcan falling in the round of 16.
Bernabe Zapata Miralles got the better of third seed Rune 3-6 6-3 6-2, while Roberto Carballes Baena ousted Molcan 3-6 6-2 6-3. Jannik Sinner and Giulio Zeppieri secured their quarter-final spots in Umag.