Top seed, Stan Wawrinka cruised into the quarter finals of the St. Petersburg Open with a confortable 6-3 6-1 victory over Czech, Lucas Rosol.
Playing his first match since winning the US Open at the start of the month, Wawrinka needed little time to find his rhythm, sending down eight aces in seeing off the dangerous Rosol in just 58 minutes.
Wawrinka thus improved his impressive record against the big-hitting Czech to 6-0.
The world number three will take on a Serbian in the next round, the identity of whom will be revealed after Victor Troicki battles Dusan Lajovic on Thursday.
In other results, fourth seed, Roberto Bautista Agut needed over two hours to overcome Lithuanian, Ricardas Berankis 4-6 6-1 7-6, while Russia’s Mikhail Youzhny gave the crowd plenty to cheer with his 6-3 7-5 victory over Janko Tipsarevic.