Rotterdam - Dominic Thiem has advanced to the second round of the World Tennis Tournament in Rotterdam with a 6-4, 6-2 victory over sixth-seeded Ernests Gulbis.
The 47th-ranked Thiem broke his Latvian opponent three times and lost just four points on his first serve to claim his first victory this season following consecutive first-round losses.
Seventh-seeded Roberto Bautista Agut also progressed to the second round after defeating German wild card Alexander Zverev 6-4, 6-1.
Simone Bolelli breezed past Lukas Rosol 6-3, 6-1 and will next face either second-seeded Milos Raonic or qualifier Andrey Kuznetsov.
Results from the first day of the ATP Rotterdam World Tennis Tournament on Monday (x denotes seeding):
Roberto Bautista (ESP x7) bt Alexander Zverev (GER) 6-4, 6-1
Dominic Thiem (AUT) bt Ernests Gulbis (LAT x6) 6-4, 6-2
Simone Bolelli (ITA) bt Lukas Rosol (CZE) 6-3, 6-1