Umag - Third-seeded Jeremy Chardy thumped Serbian qualifier Nikola Cacic 6-2, 6-0 on Wednesday to advance to the quarter-finals of the Croatia Open.
Cacic had recorded his first tour-level victory on Monday when he defeated Britain's Aljaz Bedene in the first round.
Chardy will next face Carlos Berlocq of Argentina, who was leading 7-5, 3-0 in the second set against eighth-seeded Jiri Vesely of the Czech Republic when his opponent retired because of a shoulder injury.
Last year's finalist, Fabio Fognini of Italy, advanced with a 6-4, 6-1 victory over Renzo Olivo of Argentina. Fourth-seeded Fognini is playing in Umag for the ninth consecutive year.
Damir Dzumhur of Bosnia-Herzegovina rallied to defeat Thomas Fabbiano of Italy 4-6, 6-1, 6-2.
Results from the third day of the ATP Tour event in Umag on Wednesday (x denotes seeding):
Second round
Fabio Fognini (ITA x4) bt Renzo Olivo (ARG) 6-4, 6-1
Damir Dzumhur (BIH) bt Thomas Fabbiano (ITA) 4-6, 6-1, 6-2
Carlos Berlocq (ARG) bt Jir Vesel (CZE x8) 7-5, 3-0 - retired
Jeremy Chardy (FRA x3) bt Nikola Cacic (SRB) 6-2, 6-0