Borna Coric beat 2020 U.S. Open champion Dominic Thiem 7-6 (3), 6-2 on Sunday to send Croatia into the group stage of the Davis Cup with a victory over Austria.
Coric helped the Croatians win their second Davis Cup title in 2018, but he was sidelined when they lost in the 2021 final while missing a year of action with a right shoulder injury.
He returned to the tour last March, winning a Masters 1000 title in August in Cincinnati, Ohio, and rejoined the Croatians when they reached the Davis Cup semifinals last year.
His victory over Thiem, who has also dealt with injuries in recent years, gave Croatia a 3-1 victory in Rijeka. The Austrians had taken the tie against the No. 1 team in the Davis Cup rankings to a fourth match when Alexander Erler and Lucas Miedler beat Ivan Dodig and Nikola Mektic 6-3, 7-6 (11) in the doubles match earlier Sunday.
Chile, Finland, the Netherlands, South Korea and the Czech Republic also completed victories Sunday to secure their places in the next round, which will be played in September.
On Saturday, the U.S. completed a sweep of Uzbekistan, while Serbia, France, Britain, Switzerland and Sweden also finished off victories. Those 12 countries will play in the group stage, along with reigning champion Canada, 2022 runner-up Australia and wild-card recipients Italy and Spain.
Eight teams will then advance to the closing matches of the Davis Cup Finals scheduled for Nov. 21-26 in Malaga, Spain.
There were five other matches on Sunday:
Finland 3, Argentina 1: On indoor hard courts in Espoo, Finland, Harri Heliovaara and Emil Ruusuvuori edged Maximo Gonzalez and Andres Molteni 7-6 (5), 4-6, 6-4, before Ruusuvuori secured the winning point and a personal 3-0 weekend by beating Facundo Bagnis 7-5, 6-1.
Netherlands 4, Slovakia 0: On indoor hard courts in Groningen, Matwe Middelkoop and Wesley Koolhof sent the hosts through with a 6-3, 6-3 victory over Alex Molcan and Lukas Klein. Middelkoop then beat Jozef Kovalik 6-4, 6-4.
South Korea 3, Belgium 2: On indoor hard courts in Seoul, the hosts rallied from a 2-0 deficit after the first day. Min-Kyu Song and Ji Sung Nam kept them alive with a 7-6 (3), 7-6 (5) victory over Joran Vliegen and Sander Gille. Soonwoo Kwon then beat David Goffin 3-6, 6-1, 6-3 before Seong Chan Hong completed the comeback with a 6-3, 7-6 (4) victory over Zizou Bergs.
Czech Republic 3, Portugal 1: On an indoor clay court in Maia, Portugal, Jiri Lehecka wrapped up the victory by beating Joao Sousa 6-4, 6-1.
Chile 3, Kazakhstan 1: On an outdoor clay court in La Serena, Chile, Cristian Garin beat Alexander Bublik 6-4, 3-6, 6-3 after the hosts had taken the lead with a victory by the doubles team of Alejandro Tabilo and Tomas Barrios Vera.