Kitzbuehel, Austria - Jurgen Zopp of Estonia upset 2009 champion Guillermo Garcia-Lopez 6-1, 6-3 on Monday in the first round of the Bet-at-Home Cup.
The 80th-ranked Zopp raced to a 5-0 lead before the sixth-seeded Spaniard managed to hold serve for the first time.
Garcia-Lopez had an early break in the second set but then lost his serve four times in a row.
Earlier, Martin Klizan of Slovakia defeated Austrian wild card Dominic Thiem 6-1, 3-6, 7-5 on Monday in the first round of the Bet-at-Home Cup.
The fifth-seeded Klizan failed to score a point while serving for the match at 5-3 but broke Thiem again in the final game of the match.
Filippo Volandri rallied to beat Alessandro Giannessi 1-6, 6-4, 6-3 in an all-Italian match, and Antonio Veic of Croatia routed eighth-seeded Blaz Kavcic of Slovenia 6-1, 6-2.
Attila Balasz of Hungary downed Martin Fischer of Austria 6-3, 1-6, 7-6 (2) to set up a second-round match against Philipp Kohlschreiber. The top-seeded German, who will play at the London Olympics, had a bye in the opening round of the Austrian clay-court event. - Sapa-AP