SHANGHAI, China -- Seventh-seeded Juan Monaco was upset by fellow Spaniard Fernando Verdasco 6-4, 6-2 Tuesday in the second round of the Shanghai Masters.
The 23rd-ranked Verdasco broke his opponent three times and hold serve throughout the match.
"I think I played a great match from the beginning until the end," Verdasco said. "I knew how I was supposed to play to beat him and I think I did it pretty well."
Earlier, eighth-seeded American John Isner saved three match points in the third-set tiebreaker before outlasting Kevin Anderson of South Africa 7-6 (3), 6-7 (8), 7-6 (7). In a match where neither play dropped his serve, Isner hit 24 aces while Anderson had 21.
"The quality was good as far as serving goes," said Isner, who wasted a match point in the second-set tiebreaker. "But other than that I think we maybe both could have played better a little bit. I guess it was exciting from a fan standpoint. Anytime a match comes down to a third-set tiebreaker, it's going to be exciting."
Kei Nishikori, who is coming off a win at home at the Tokyo Open last week, had little trouble securing a 6-2, 6-4 first-round win over wild-card entry Wu Di of China.
"Obviously, it's not easy thing to play after winning the tournament," said the 15th-ranked Nishikori. "You want to rest. But I had a good day today."
Florian Mayer of Germany eased to a 6-4, 6-0 first-round win over Bernard Tomic of Australia in just 45 minutes.
"My lack of concentration I think cost me," Tomic said. "I feel like my mental skills weren't there."
In other first-round matches, No. 12 Milos Raonic of Canada beat Marinko Matosevic of Australia 7-6 (4), 6-3, 13th-seeded Stanislas Wawrinka of Switzerland ousted Albert Ramos of Spain 7-6 (1), 7-6 (5), and 15th-seeded Gilles Simon of France beat Jurgen Melzer of Austria 6-4, 6-2.