Kooyong Classic, Melbourne
David Nalbandian denied Andre Agassi a fourth Melbourne title in five years with a surprise 6-2 6-3 victory.
Nalbandian never allowed top seed Agassi to get a grip on the match and added the American's scalp to that of semi-final victim Andy Roddick.
Three times in the last four years Agassi has lifted the cup in Kooyong and gone on to win the Australian Open on each occasion.
But he said: "Today is a good example of how hard it is to win out here."
The American added: "I could only manage five games. It was a tough day, that's for sure.
"There's no question I felt pretty good. There was nothing to complain about except my opponent."
The victory is a major boost for Nalbandian ahead of the Australian Open, which begins on Monday.
"Andre is a great player. I played really well today," said the Argentine. "Not every day you can beat an incredible, unbelievable player like this.
"Well, I think it was important to play these matches against these players. I am feeling very, very good at the moment and I hope to continue like this the next two weeks."
adidas International, Sydney
Lleyton Hewitt was handed his third Sydney International title after Spain's Carlos Moya retired from the final with an ankle injury.
Moya twisted his right ankle in the seventh game of the opening set and eventually conceded defeat before going to hospital for a scan.
Moya is now a doubt for the Australian Open, where he is seeded six and due to meet James Blake in round one.
Hewitt played a total of just two sets in the semi-final and final. Dutch opponent Martin Verkerk retired after losing the first set of their semi-final saying he was dizzy and unwell.
Todd Woodbridge collected an ATP tour record 79th career doubles title when he and Swede Jonas Bjorkman beat American brothers Bob and Mike Bryan 7-6 (7-3) 7-5.
The 32-year-old Australian ended last season at 78 doubles titles, tied for the Open era record with retired Dutchman Tom Okker.
"It's a pretty special moment for me. I was nervous about today. I played pretty well and I'm happy," said Woodbridge.
"It couldn't be a better script for us. I tied the record in Stockholm last year in Jonah's home town. To pass the record here in my home town is magnificent."
Heineken Open, Auckland
Slovakia's Dominik Hrbaty ended the hopes of Spanish teenager Rafael Nadal to win his second straight ATP Tour title.
Nadal, who had brushed aside second seed Jiri Novak to reach his first ATP final, won the first set 4-6.
But unseeded Hrbaty followed up on his victory in the AAPT Championships in Adelaide last week with a 4-6 6-2 7-5 triumph despite being a break down in the deciding set.
"I was very tired in the final," said Hrbaty. "In the first set I didn't think I could do it because I was feeling so tired after Adelaide and he was making me run around so much."
"There was just a special moment in the match when I told myself I had to win."