WALTHAM, Mass. (AP) — Hanging on a wall of the Celtics' practice facility, opposite the faded banners that hung in the old Boston Garden a half-century ago, is a spotless one.
It went up a few years ago to hold the location where the NBA's greatest champions would mark their next title.
That banner will apparently remain blank another year. As soon as Sunday, the Celtics' quest for No. 18 could be over for this season.
Down 3-0 to the New York Knicks, the Celtics are thinking much smaller than another title when they host Game 4 on Sunday afternoon.
"You've got to focus on the single game. You can't win four without winning one," Boston coach Doc Rivers said Saturday.
Even that looks difficult for a Celtics team that can't get any offense going. Boston has averaged a feeble 75 points, not breaking 80 in any game, on 39.5 percent shooting.
No NBA team has overcome a 3-0 deficit to win a series, as the Knicks know. They were swept by the Celtics two years ago and managed only to get to Game 5 after dropping the first three against Miami last year, when they ran their NBA-record postseason losing streak to 13 games.
Now Carmelo Anthony sees the Celtics in the same position he was in during his first two postseasons in New York, and he wants the sweep.
"To be honest with you, to accomplish that would be spectacular. It would be a dream come true. I've never swept anybody. But we know Game 4 is win or go home for them guys," Anthony said.
"I've been on that side of the ball plenty of times and I know that feeling, so I know the type of energy they're going to come out and display here on Sunday. We've just got to be prepared for the punches that they throw and everything they put out there on the basketball court."
There haven't been any punches, though the Celtics' Jason Terry did take an elbow in the chin from New York's J.R. Smith late in Game 3. The NBA suspended Smith for Sunday's game.
Terry wouldn't comment on the play Saturday, but said he was annoyed by what he thought was some Knicks' showboating and is clearly agitated by what's gone on in the series.
"I mean, when you get your butt kicked like they've been doing to us the last week or so and you're seeing the same team every day, you're going to get tired of it. Or you're going to lay down. I'm tired of it," Terry said.
The Celtics haven't lost in the first round since 2005 and haven't been swept since Indiana beat them in the first round a year earlier.