Jiri Lehecka defeated former World No. 3 Dominic Thiem 6-3, 7-5 at the Croatia Open. 2006 champion Stan Wawrinka also advanced later in the day. Wawrinka, who won his first ATP Tour title in Umag 17 years ago, surged past Argentine Federico Coria 7-5, 6-1 to earn his spot in the last eight. The former World No. 3 will next face Roberto Carballes Baena, who eliminated Taro Daniel 6-3, 6-1. Wawrinka won 56 per cent of the first-serve return points he faced against Coria, resulting in five service breaks. For the first time since 2007, the Swiss are participating in Umag. Jaume Munar defeated Fabian Marozsan 6-4, 6-3 to progress as well. The second seed Lorenzo Sonego, who defeated Marco Cecchinato 6-1, 7-6(7), will now face the Spaniard. After one hour and 37 minutes, Sonego won the second set tie-break after fending off one set point. The 28-year-old reached the fourth round at Roland Garros, which was his finest performance on clay this season.