GSTAAD, Switzerland (AP)—Two-time champion Thomaz Bellucci won his first-round match at the Swiss Open on Tuesday, beating Gerald Melzer of Austria 6-3, 6-4.

The 93rd-ranked Brazilian, who next plays fifth-seeded Federico Delbonis of Argentina, won two of his three career titles on clay in the Swiss mountains, in 2009 and 2012.

Last year's runner-up, seventh-seeded Robin Haase of the Netherlands, also won his opener, 6-4, 6-7 (3), 6-3 against Aleksandr Nedovyesov of Kazakhstan.

Top-seeded Mikhail Youzhny of Russia, the defending champion, begins against Kenny De Schepper after the Frenchman beat Filippo Volandri of Italy 6-3, 7-6 (3).

Also Tuesday, Blaz Rola of Slovenia beat Brazil's Fabiano De Paula 6-4, 6-4 and Jan-Lennard Struff of Germany advanced. Struff led Andreas Haider-Maurer 6-2, 1-0 when the Austrian retired injured.