QUITO, Ecuador — Gerald Melzer of Austria upset No. 6-seeded Horacio Zeballos of Argentina 6-7 (4), 6-3, 7-6 (4) on Monday to reach the second round of the Ecuador Open. The clay-court tournament is the first of five across Latin America, The other stops are in Buenos Aires, Rio de Janeiro, Sao Paulo, and Acapulco,
