Bulgaria's Grigor Dimitrov and Belgian David Goffin, the duo who faced off in last year's season-ending ATP Finals, both advanced at the Rotterdam Open on Wednesday with straight-sets wins. Second seed Dimitrov, who beat fourth seed Goffin in the London final last November, had to fight back in the second set to defeat Japan's Yuichi Sugita 6-4, 7-6 (7/5) in their first-round encounter. Goffin made light work of veteran Spaniard Feliciano Lopez, cruising through 6-1, 6-3 to reach the quarter-finals in his second match of the week. Dimitrov won the opening set against Sugita but fell behind a break in the second before levelling for 5-all. As the set went into a tie-break, the Bulgarian surged ahead as he took a 5-2 lead but had to hold off his opponent as Sugita clawed back to within a point of levelling.
But Dimitrov then sent a forehand into the corner to earn a pair of match points and advanced on his second with a service winner to end the resistance of the 41st-ranked Sugita.
Last week's Montpellier champion Lucas Pouille exited in his opening match, losing 7-5, 6-4 to Andrey Rublev.
The Russian was joined in the second round at the Ahoy Arena by Pierre-Hugues Herbert of France, who advanced after just 15 minutes when compatriot Richard Gasquet, the Montpellier finalist, retired with a groin injury trailing 3-1.
Top seed Roger Federer is expected on court later on Wednesday as he launches his bid for a return to the world's number one ranking against Belgian Ruben Bemelmans in a first-time meeting.
The 36-year-old Federer could become the oldest man by three years to hold the number one spot if he reaches the semi-finals at an event he has won twice.
Pouille lost in 93 minutes, hitting a dozen aces in defeat but losing serve four times.
The 34th-ranked Rublev owns his only career title from Umag last summer on clay. Herbert will play Russian Daniil Medvedev in the second round.
Robin Haase won an all-Dutch affair over Thiemo de Bakker 6-2, 6-2.
(With AFP Inputs)