Updated

Umag, Croatia (SportsNetwork.com) - Reigning champion Tommy Robredo and Croatian crowd favorite Marin Cilic eased into the quarterfinals at the Croatia Open tennis event on Wednesday.

The second-seeded Robredo handled fellow Spaniard Albert Ramos-Vinolas 6-4, 6-4, while the third-seeded 2012 Umag champion and 2011 runner-up Cilic humbled Dutchman Igor Sijsling 7-5, 6-3 on the red clay at ITC Stella Maris.

"It is good that I won in two sets, conditions here are tough with humidity and heat," Cilic said. "I have adjusted well to the conditions, but winning as fast as possible is always recommended."

Up next for the former world No. 5 Robredo will be another fellow countryman, Pablo Carreno Busta, while the one-time world No. 9 Cilic will meet Czech slugger Lukas Rosol.

Also in the second round, a fifth-seeded Rosol doused Spaniard Pere Riba 7-6 (7-4), 6-1 and Carreno Busta moved on via walkover when eighth-seeded Argentine Carlos Berlocq pulled out of the draw.

On Thursday, top-seeded Italian star Fabio Fognini will face Spaniard Albert Montanes in the round of 16. Fognini was last year's runner-up to Robredo.

The 2014 Croatia Open titlist will collect $105,000.