Guido Pella was surprised by Brazilian Guilherme Clezar, who defeated him in Campinas Challenger quarter-finals.
Defending championship and top seeded was beaten 7-5, 7-6 (5) by 20 years old player after one hour and 38 minutes.
The player borned in Bahia Blanca suffered a break in the first set and the saved two match points in the second, but he losses in tie break and after a wrong decision of a lineman.
Pella was ousted in doubles main draw too. Performing with Peruvian Sergio Galdos, lost in semifinals against Thiago Alves and Thiago Monteiro.
Porto Alegre Challenger will be Pella's next tournament.
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