INDIANAPOLIS -- Only one more game at the World Championships will match two unbeaten teams. The United States warmed up for it by getting their act together in the second half Tuesday night.

	Jermaine O'Neal, front right, Elton Brand, back right, fight for a rebound in the Americans' lethargic first half.

With Paul Pierce and Michael Finley leading the way, a dominant third quarter made up for an uninspired first half in a 110-62 victory over New Zealand.

Pierce and Finley scored 20 apiece and Shawn Marion added 16 for the Americans (5-0), who conclude the second round against Argentina (5-0) on Wednesday night. The quarterfinals are Thursday.

''In a lot of ways, the games begin now. Every team has a chance to beat us if we don't play the right way,'' U.S. coach George Karl said.

Karl watched parts of the Argentina-Germany game from the tunnel near the Indiana Pacers' locker room, and his team came out playing as though they were looking ahead instead of concentrating on the present.

Despite being without its only NBA player as Sean Marks sat out with a scratched eye, New Zealand kept it close for 24 minutes. The U.S. team outscored them 27-10 in the third quarter, and 35-10 in the fourth to make it a rout.

The Americans, playing lethargically for long stretches, didn't open their first double-digit lead until midway through the third quarter. They held New Zealand scoreless for a stretch of 6½ minutes and used a 15-0 run that included an eight-point possession to break things open.

''We tried every trick in the book,'' New Zealand coach Tab Baldwin said. ''For a while there were some things that worked, but the water on the other side of that dam is pretty deep and pretty cold, and we didn't have enough fingers to keep that thing from busting.''

The United States improved to 58-0 when using teams of NBA players in international competitions, but that unblemished record could be at risk against the South American champions.

Argentina has been one of the most impressive teams in this tournament, scoring 100 points per game and winning by an average of 20.8 points.

''They're probably more NBA-like than any team that we play. They have very good players at every position, and they have the depth to go 10 or 11 deep,'' Karl said.

''We've been successful wearing teams down and fatiguing them, but I don't know if that's going to be the case tomorrow.''

Just last week the Argentines viewed the Americans as unbeatable, but that opinion has changed as the U.S. team has struggled for long stretches against mediocre opponents such as Germany, China and New Zealand.

Beating them no longer seems the mission impossible it once did.

''It has looked more possible as the (tournament) has gone on,'' said Argentina guard Emanuel Ginobili, who will be a rookie for the San Antonio Spurs in the upcoming NBA season. ''The most normal thing in the world will be for Argentina to lose that game to the United States, so we will have no pressure.''

A contingent of about 40 New Zealand fans chanted, ''Look at the scoreboard,'' midway through the first quarter when the U.S. team trailed 14-13. The scoreboard remained an interesting site at the end of the period when New Zealand held a 25-22 edge.

The Americans defended and rebounded with much more intensity in the second quarter, yet they could never pull very far ahead. A layup off an inbounds pass by Kirk Penney cut New Zealand's deficit to 44-42 with 1:09 left before halftime.

The U.S. team's ability to control the offensive boards made the difference when they finally started to pull away. Andre Miller scored on a putback after grabbing the fourth offensive rebound of one possession, and Elton Brand tossed in a short jump hook for a 59-48 lead after outmuscling two players for a rebound under the U.S. basket.

Consecutive blocked shots by Jermaine O'Neal fired up his U.S. teammates, and the Americans followed with an extreme basketball rarity -- an eight-point possession. A 3-pointer by Pierce was followed by a technical foul on New Zealand's head coach. Finley made both technical foul shots, and another 3-pointer by Pierce gave the U.S. team a 67-48 lead.