Sixth-seeded Andreas Haider-Maurer advanced to the second round of the Grand Prix Hassan II tournament Tuesday with a 6-2, 6-7 (0), 7-6 (5) win against Germany's Jan-Lennard Struff, while Belgian qualifier Arthur De Greef also progressed after beating eighth-seeded Argentine Diego Schwartzman 4-6, 7-5, 6-4.

Although Struff had 15 aces compared to five for Haider-Maurer, he struggled on his second serve and dropped serve three times. In an error-strewn match, De Greef lost his serve four times but broke his opponent five times.

Also, Moroccan wildcard Lamine Ouahab beat Dutchman Robin Haase 6-2, 6-4 to set up a second-round match against top-seeded Guillermo Garcia-Lopez of Spain.

Haider-Maurer next plays Spaniard Pablo Andujar, while De Greef faces British qualifier Aljaz Bedene. They both won their first-round matches on Tuesday.