Sunday, they could pull off the biggest upset in NBA history after a Game 6 Friday night Hawks victory that couldn't have produced more sparks if it was a toaster tossed in a bathtub.

The Atlanta Hawks versus Boston Celtics. The 7th and deciding game. In Boston. Tip-off 1 p.m., ABC.

If you're a sports fan in this town, and you've got other plans, change them. Your fiance won't mind moving the wedding back to August.

Because, honey, this is humongous.

The Hawks have the worst season record of any of the eight teams in the playoffs (37-45). The Celtics have the best (66-16).

This isn't David and Goliath. This is Bambi and Godzilla.

"Biggest upset in NBA history?" Atlanta sports talker Steak Shapiro, of 790 The Zone, asked Saturday. "This could be the biggest upset in the history of sports. Bigger than the American Olympic team beating the Russians at hockey."

The setting, a 7th game in Boston, recalls perhaps the greatest game in Atlanta Hawks' franchise history, when, almost exactly 20 years ago, Celtic great Larry Bird dueled Hawk great Dominique Wilkins in the 4th quarter, and Boston won 118-116.

Hawks fan William Wolf, 20, was born then, but just barely. He's seen the replays, he said Saturday, and he's psyched today could be payback.

"All the ESPN analysts predicted this playoff was going to go four games, the Celtics sweeping the Hawks," said Wolf, who plans to watch the game at Manuel's Tavern.

"I think it's great that the Hawks have taken them to seven. And I think it's great they've proven all the analysts wrong."

Sports talk show host John Kincade of 680 The Fan — who had predicted the Celtics would rout the Hawks, no problem, in the first round — said Saturday, win or lose, the team's performance could already have changed the franchise.

"This game has the chance to be the defining moment in team history in terms of what it means to fans and the franchise," said Kincade.

"If they lose, it will still have an effect on ticket sales next year. If they win, and go to the next round of the playoffs, I think it will be an impact that is truly sustaining for a long time."

Of course, there's always two sides to a story, even when you really don't care what the other side of the story is. In Boston, things have been ... edgy.

"You guys are breaking my heart," said Celtics fan Bill Scott, on the phone from Beantown Saturday afternoon. "You're keeping me up all night. Why are they fighting so hard? You're supposed to lose!"

What are the prospects today of the Celtics making all the geniuses on ESPN eventually look like they might know what they're paid to be talking about?

The Hawks have won all three games in this series that were played in Atlanta and lost all three played in Boston. Shapiro and Kincade both said they figure the Celtics will take the game and the series.

Scott said he's not so sure.

"It feels different to me than it did back in 1988 when we won the seventh game," said Scott. "We don't have a Larry Bird on the team, a guy that can win it for you in the 4th quarter.

"Weren't you guys supposed to roll over and die?"