CASABLANCA, Morocco — 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 Tuesday. Bedene beat Argentine Maxime Gonzalez 6-3, 3-6, 6-3, while Andujar broke German Tobias Kamke's serve five times in a 6-3, 6-4 win. In other first-round matches: Russian Mikhail Youzhny beat Moroccan wild card Yassine Idmbarek 6-3, 6-1; Bosnia's Damir Dzumhur won 6-2, 7-6 (2) against French veteran Paul-Henri Mathieu; Spaniard Nicolas Almagro thrashed qualifier Taro Daniel of Japan 6-4, 6-1; and countryman Daniel Gimeno-Traver also advanced comfortably with a 6-4, 6-3 win against Tunisian Malek Jaziri. Soeda ousts Hewitt Japan's Go Soeda rallied to beat Lleyton Hewitt 4-6, 7-6 (3), 6-3 Monday night in the first round of the US Men's Clay Court Championship in Houston. The 34-year-old Hewitt, a former world No. 1 and the tournament's 2009 champion, needed two wins here to become the seventh player in the Open Era to have 100 wins each on hard courts, grass and clay. He was a held serve away from getting No. 99 on clay before Soeda broke, won the subsequent tiebreaker, then kept the upper hand throughout the third set. The match ended on a Hewitt double fault. Hewitt has won 367 times on hard courts and 128 on grass. Boris Becker, Jimmy Connors, Roger Federer, John McEnroe, Stan Smith and John Alexander have previously topped 100 wins on each of the three surfaces. Also advancing were Hewitt's Australian countryman, Sam Groth, eighth-seeded American Sam Querrey and Ricardas Berankis of Lithuania. Groth had 17 aces to eliminate Victor Estrella Burgos of the Dominican Republic 7-6 (3), 6-4; Querrey moved on when his Australian opponent, Marinko Matosevic, retired with a left foot injury down 1-4; and Berankis knocked out Federico Delbonis of Argentina 6-2, 7-6 (5). Spain's Feliciano Lopez is the top seed in North America's only men's clay-court tournament. Vekic upsets Watson In Charleston, South Carolina, Donna Vekic of Croatia upset Britain's Heather Watson 6-3, 4-6, 7-5 in the opening round of the Family Circle Cup Monday. In other matches, Czech qualifier Lucie Hradecka of the Czech Republic defeated 11th-seeded Zarina Diyas of Kazakhstan, 4-6, 6-1, 6-3, Mona Barthel of Germany beat Timea Babos of Hungary, 6-3, 6-3, and Kristina Kucova of Slovakia topped Croatia's Mirjana Lucic-Baroni 6-3, 3-6, 6-3. Canada's Eugenie Bouchard is the top seed and received a first-round bye. — Agencies