The 22-year-old hometown hero captured the 533,350-dollar top prize at the 3.45 million-dollar tournament with his tour-best 26th victory of the year against five defeats. Coria fell to 17-3.

Coria, winless in three matches against Roddick, received medical treatment after the 11th game of the first set for back pain that began after he lunged for a backhand.

But cheered on by a flag-waving and hard-cheering group of supporters he showed no sign of trouble in ripping to a 5-0 lead on his way to claiming the tie-breaker.

"I knew I was not going to be able to finish the match," Coria said through a translator. "I knew I would not be able to run the way I must in order to win but I didn't want to disappoint the crowd.

"I'm a little disappointed, but I felt like I was playing in Argentina."

Roddick broke Coria in the third and final games of the second set, which he claimed on the South American's first double fault of the match.