Del Potro Defeats Tomic in Sydney International Final Top-seeded Juan Martín del Potro defeated the defending champion Bernard Tomic, 6-3, 6-1, in the final of the Sydney International in Australia. Del Potro finished the match with his eighth ace and made only four unforced errors in securing his 18th career title and first in Sydney. ■ John Isner had 23 aces in a match that had no service breaks to beat Yen-Hsun Lu, 7-6 (4), 7-6 (7), in the Heineken Open final in Auckland, New Zealand. ■ In the final of the Kooyong Classic in Melbourne, Australia, Kei Nishikori of Japan joined his coach, Michael Chang, as a tournament champion with a 6-4, 7-5 win over Tomas Berdych.