Tennis: Two-time defending champion Andre Agassi won his third title of the year and the sixth Key Biscayne crown of his career yesterday with a stunning 6-3, 6-3 win over fifth seed Carlos Moya of Spain.

Agassi is 18-1 for the year, earning his eighth career Grand Slam trophy at the Australian Open in January and winning the San Jose, California, title in February.

"It's been incredible," said Agassi, of his year thus far.

"It's hard to believe it's all still possible out there."

The victory was an historic occasion for Agassi, marking the first time in his career that the American has won a particular title six times. He has won the San Jose and Washington DC titles on five occasions.

Agassi was quick to note that the win broke a tie with his wife, Steffi Graf, who won a record five Key Biscayne titles.

"I finally beat her at something," Agassi quipped as he accepted his trophy.

In a rare and brief TV interview done during the match, Graf said she was "rooting" for her husband to break their Miami tie.

"It's nerve-wracking at times," said Graf, sitting with her mother, Heidi, and son, Jaden. "You know exactly what's going on out there. You just hope for the best. It's hard because you have to sit here and can't do anything."

Although Agassi declared the match of good quality, there was no doubt that he dominated the proceedings from start to finish.

He had an incredible first-serve percentage of 71 to only 49 for Moya, which allowed him to concentrate on breaking the Spaniard's serve.

"Today was certainly a great day for me, serving wise," Agassi said. "I think specifically because it was breezy. Any time you can get a good percentage of first serves in, especially on key points, in windy conditions, it's a big advantage."

Moya, who moves to No. 4 in the rankings today, thought he put in a sub-par performance but was quick to admit that the world No. 2 was tough to beat.

"I think I didn't play a good match," said Moya, a former French Open champion, who won his 12th career title at Buenos Aires last month.

"He put a lot of pressure, he played great, but if I wanted to win this match, I had to serve very well and today I didn't. Also, my return has been very bad."

Agassi was particularly pleased that his serve was on because a shoulder injury had prevented him from playing the season's first Tennis Masters Series event, at Indian Wells earlier this month.

One month away from his 33rd birthday, Agassi is playing what could be the best tennis of his career.

"It's hard work and it's a lot of luck and staying healthy," Agassi said of still being at the top of the game. "I can't tell you how important that is."