"It's a great preparation, so confidence is high," said Federer. "I felt that my game is ready to go ... and I proved it again."
In a playoff for third, Andre Agassi lost to Tim Henman.
Agassi's status was in doubt for the Australian Open when he injured his right hip and retired in the first set here against Andy Roddick on Thursday.
Against Henman, he was down a set and break before he rallied to force the match into a third set. But Henman stayed strong, breaking Agassi's serve in the last game for a 6-3, 6-7 (5), 7-5 win.
"It was nice to be out here and put it through a test for a couple of hours," said Agassi, adding that he'd have to monitor the injured hip overnight before confirming he'll be OK for the season's first major.
If he's fit, he'll be in the top quarter of the draw with Federer and the pair could meet in the quarterfinals.
Federer won 11 titles last season -- including three majors -- and all without a coach.
Lleyton Hewitt recovered from a first-set lapse that allowed Ivo Minar to win five straight games before beating the Czech qualifier 7-5, 6-0 in the final.
It was Hewitt's fourth Sydney title -- he won previously in 2000, 2001 and 2004 -- and his 20th straight match victory here.
In the all-Australian women's final, sixth-seeded Alicia Molik beat Samantha Stosur 6-7 (5), 6-4, 7-5.
Stosur benefited from walkover wins in her two previous matches. Top-seeded Lindsay Davenport pulled out with bronchitis against Stosur in the quarterfinals and on Friday third-seeded Elena Dementieva had heat sickness.
Serbia-Montenegran teenager Ana Ivanovic won her first WTA Tour title with a 7-5, 6-1 win over Melinda Czink.
The 17-year-old Ivanovic took 83 minutes to beat the Hungarian in the first tour final between a lucky loser and the player who beat them in qualifying.
Ivanovic eliminated Czink in the last round of qualifying but the Hungarian made the main draw after Auckland Classic winner Katarina Srebotnik withdrew with an injury.
Fifth-seeded Fernando Gonzalez of Chile beat Olivier Rochus of Belgium 6-4, 6-2 to win the US$426,000 tournament.
Gonzalez used a powerful serve to overwhelm his unseeded rival, claiming his fifth ATP title and the winner's check of US$55,000. The hard-hitting Chilean conceded only seven points on serve in the first set and four in the second, winning the championship in 75 minutes.
Rochus, at 1.65m the smallest player on the men's circuit, saved six break points in the first set and six in the second before Gonzalez took the match.
"Some weeks I play good and some not. This was my week," Gonzalez said.
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