"It's fun to be the marked guy and everybody is gunning for you," said Fish, who reached the final in San Jose, California, this month.

Spadea, who reached at least the quarters here every year since 2004, has been fighting a virus and fever since his first-round match.

"I think there are some factors, and those factors being that he's improved, he's playing well and I was under-conditioned," Spadea said. "I just didn't have a lot of energy out there and my whole game thrives on energy, and grinding, and getting an extra ball back, and winning ugly, really."

Fish will next meet sixth-seeded Florent Serra of France, who overcame Mischa Zverev of Germany for the first time, 6-3, 4-6, 6-4.

Seventh-seeded Jeremy Chardy of France reached his third quarterfinal of the year with a 7-6 (4), 7-5 win over Andrey Golubev of Kazakhstan.

Chardy, who reached his first career final in Johannesburg this month, will face Marcos Baghdatis in the quarterfinals. The Cypriot outlasted Dudi Sela of Israel, 7-6 (7), 6-3.

【体坛英语资讯：Serbian Djokovic enters Dubai final】相关文章：

★ 娱乐英语资讯：DJ took drugs with Kate Moss

★ 体坛英语资讯：Bryant heads U.S. basketball team to Beijing Olympics

★ 体坛英语资讯：1st torchbearer: Beijing Olympic Games to be big success

★ 体坛英语资讯：Liu settles for nothing but world title

★ 体坛英语资讯：Chinas new and old set early pace at worlds

★ 娱乐英语资讯：Beyonce tops People fashion list

★ 体坛资讯：Yao Ming NBAs No. 1 center: Dime Magazine

★ 体坛英语资讯：Li Yang sets womens 50m backstroke world mark

★ 体坛英语资讯：Olympic torch relay in Muscat concludes

★ 体坛英语资讯：Xinjiang likely to be booted from CBA playoffs for cheating