Top seed Cilic cruises into quarters

Top-seeded Marin Cilic cruised into the quarterfinals of the $125,000 Dallas Tennis Classic, but a surprise awaits him Friday in the ATP Tour Challenger event.

Next up for Cilic is a meeting with Frank Dancevic after the 175th-ranked Canadian became the only qualifier to reach the final eight with a 7-6 (7-3), 4-6, 6-3 upset of fifth-seeded Yen-Hsun Lu of Chinese Tapei on a blustery Thursday at the Four Seasons Resort and Club in Las Colinas.

Despite the windy conditions, world No. 24 Cilic faced only slight trouble at the end of his round-of-16 match against Lukas Rosol of the Czech Republic. The Croatian won the first nine games and ultimately claimed a 6-0, 7-6 (7-2) triumph.

Friday's other standout quarterfinal pits former world No. 2 Tommy Haas against big-serving Gilles Muller of Luxembourg. Haas advanced Thursday with a comfortable 6-2, 6-1 victory over France's Nicolas Mahut, then made the drive downtown to American Airlines Center for the second time this week to watch fellow countryman and good friend Dirk Nowitzki lead the Mavericks to a victory at home.

Muller advanced with a 6-3, 6-4 victory over Houston resident Michael Russell, who was the last American left in the 32-player main draw.

Another German with local ties -- former Baylor star Benjamin Becker -- was denied a spot in the quarterfinals with a 6-2, 6-4 loss to eighth-seeded Lukkas Lacko of Slovakia.