Eighth-seeded John Isner reached the third round of the Shanghai Masters by beating Kevin Anderson of South Africa 7-6 (3), 6-7 (8), 7-6 (7) Tuesday.
Neither player was able to break serve in the match, the first at the tournament to go to three tiebreakers. Isner saved three break points and Anderson saved four.
Isner finished the match with 24 aces and Anderson had 21.
In the first round, 13th-seeded Stanislas Wawrinka of Switzerland beat Albert Ramos of Spain 7-6 (1), 7-6 (5), 14th-seeded Kei Nishikori of Japan defeated Di Wu of China 6-2, 6-4, and 15th-seeded Gilles Simon of France beat Jurgen Melzer of Austria 6-4, 6-2.