ATHENS, Greece -- Their shots clanged off the rim, smacked

the side of the backboard or missed completely. Their best player

stared at the floor helplessly as the ball squirted between his

legs and rolled away.

Whatever remained of America's aura of invincibility slipped

away, too, in a shocking, lopsided loss that left their coach

embarrassed and angry.

Tim Duncan, Allen Iverson and the rest of the U.S. basketball

team fell 92-73 to Puerto Rico on Sunday, only the third Olympic

defeat ever -- and first since adding pros -- for the nation that

ruled the sport for three-quarters of a century.

It was by far the worst defeat for a U.S. men's team, coming in

the Americans' first game of the Athens Olympics. Having it happen

against a team they had dominated in the past 13 months only made

it hurt worse.

"I'm humiliated, not for the loss -- I can always deal with wins

and losses -- but I'm disappointed because I had a job to do as a

coach, to get us to understand how we're supposed to play as a team

and act as a team, and I don't think we did that," Larry Brown

said.

Puerto Rico, which had lost to the Americans five times since

last July, led for more than 33 minutes of the 40-minute game, was

ahead by 22 at halftime and gamely held off a fourth-quarter

comeback for one of the greatest sports achievements in the

territory's history.

"We're a small island with a big heart," guard Elias Ayuso

said.

The loss was a blow to the Americans' confidence, but it did

little to hurt their gold medal chances. They need only to finish

in the top four of their six-team group to reach the quarterfinals.

Still, the defeat will go a long way toward giving the

competition hope that it's someone else's turn to move to the top

of the sport.

As Carlos Arroyo left the court with just over a minute left, he

defiantly pulled at the words "Puerto Rico" on his jersey. He led

his team with 24 points.

"That was him telling his island of 4 million people he was

very proud to beat the big colossal from the north," Puerto Rico

coach Julio Toro said.

Anyone in America who didn't see this coming hadn't been paying

attention to the way international basketball has been changing.

The U.S. team nearly lost in the semifinals at Sydney on a

last-second shot by Lithuania, then dropped three games on its home

turf at the 2002 World Championships in Indianapolis - the first

losses ever by a U.S. team of NBA professionals.

This year's team, weakened by defections and rejections of 12

top players, had opened its pre-Olympic tour of Europe with a

17-point loss to Italy and a last-second victory over Germany - a

pair of games in which their vulnerability to a tight zone defense

was clearly exposed.

Puerto Rico exploited that weakness, too, and the Americans

could do next to nothing against the strategy.

After Lamar Odom made a 3-pointer for the U.S. team's first

points, the Americans missed 16 straight from behind the arc. They

tried to get the ball inside, but Puerto Rico collapsed several

defenders into the paint and made life difficult for the U.S.

team's best player, Duncan. He and Iverson led the team in scoring

with 15 points apiece.

American teams had been 24-0 since the professional Olympic era

began with the 1992 Dream Team, but now there is a blemish on their

record to go with two losses to the Soviet Union in the 1972 gold

medal game and the 1988 semifinals.

"I think Puerto Rico right now is celebrating big because of

this," Arroyo said. "By far it's the happiest victory of my

career."

The Americans handled the loss with grace, congratulating their

opponents and joining them in a huddle at center court before both

teams exited to a standing ovation.

The U.S Olympic team's record now stands at 109-3.

"Anybody watching that game who enjoys basketball should get a

thrill out of it," Brown said. "From our perspective, all we can

do is figure out what we're made of. I'm anxious to see if we'll be

able to do that."

The Americans shot only 35 percent, finished 3-for-24 from

3-point range and had nearly as many turnovers (22) as field goals

(26).

"We couldn't hit anything. I shot two off the side of the

backboard. Never in my life have I done that," Richard Jefferson

said. "This was a worst-case scenario."

Puerto Rico was 8-for-16 from long range and 31-55 (56 percent)

overall to help negate the Americans' 46-27 edge in rebounding.

After Odom's 3, Puerto Rico backed off and dared the Americans

to hit from behind the arc. They didn't, missing eight 3s over the

rest of the quarter to trail 21-20.

When Duncan and Iverson sat down in the second quarter, Puerto

Rico simply outclassed the Americans' young reserves. (Stephon

Marbury scored just two points, Carlos Boozer added one.) Arroyo

drove past two defenders for a layup that made it 35-22, and the

Americans were suddenly on their heels.

"International basketball is so different from the NBA," Jose

Ortiz said. "They probably didn't know because of how young they

are. I saw them a little panicked, but they were down 20 points,

what can you do?"

Whistles and jeers greeted the Americans as they emerged from

the locker room after halftime, but the crowd gave them some

support when they tried to get back in the game in the third

quarter. But each time the Americans tried to make a run, Puerto

Rico had an answer.

"They play the game the way it's supposed to be played,"

Iverson said. "It's not about athletics. That's the game the way

Karl Malone and John Stockton play it. It's good for kids to see

how the game is supposed to be played."

Now, it's up to the Americans to show whether they can play that

way, too.