Doc Rivers' phone rang sometime around 6 a.m. Friday, a concerned Boston Celtics co-owner calling to check on his coach and team.

The Celtics were already safely in New York, but forgive Steve Pagliuca for forgetting. This is a sad, confusing and chaotic time in Boston, and nobody is thinking about basketball first.

But the Celtics have a game to play Saturday, the opener of their playoff series against the Knicks, and if they can provide a boost to their struggling city with some postseason success, that gives them even more motivation in their rare role as an underdog.

"I think when you go through tragedy as a city you kind of look for something to cling on, and really I believe that the city of Boston lives and dies with our sports teams and they're going to be watching closely," longtime Celtics star Paul Pierce said. "And you know there's just a sense of pride about the city and a sense of pride about this team to go out there and kind of play well and to do the best we can for the city in the wake of the tragedy."

The Celtics' final home game of the regular season was to be Tuesday night, but that was canceled after three people were killed in the Boston Marathon bombings. They played at Toronto on Wednesday night and then came to New York, watching news reports Friday morning that showed their city being virtually shut down while authorities hunted and caught one of the suspects.

The Celtics swept the Knicks in a first-round series two years ago. This time, New York is the No. 2 seed after ending Boston's five-year reign as division champion and won three of the four meetings in the regular season.

Bulls vs. Nets: Joakim Noah is battling foot problems and might be sidelined when the series opens Saturday, leaving Chicago without its top option to defend Brooklyn All-Star center Brook Lopez.

"It's really hard, it's really hard," Noah said Friday.

Noah's absence could make a huge difference in a series between the Nos. 4 and 5 seeds in the East. Chicago won three of the four meetings during the regular season, but only one game was decided by more than four points.

Grizzlies vs. Clippers: Blake Griffin said he received treatment for the back spasms that affected him in Los Angeles' regular-season finale and that he's ready for the team's playoff opener Saturday.

Griffin practiced Friday and said his back is still a little tender but not as bad as it was Wednesday night at Sacramento when it locked up while shooting before the game.

A year ago, the Clippers opened at Memphis and rallied to tie an NBA record for largest deficit overcome in the fourth quarter and won by one point. Then, the Clippers won a Game 7 for the first time in franchise history in Memphis to advance.

Lakers: Steve Nash said after practicing with his teammates that he is "very confident" he will return from a hamstring injury for Los Angeles' playoff opener at San Antonio on Sunday. Nash hasn't played in April.

Kings: A recommendation on the team's sale and possible move to Seattle might be issued as soon as next week and a final decision made early next month, ending a process NBA commissioner David Stern called the most "wrenching" of his career.

Cavaliers: Mike Brown, who along with LeBron James led the Cavs to their greatest heights before he was fired three years ago, is one of the candidates Cleveland intends to speak with as it looks to replace fired coach Byron Scott.

Draft: Detroit won a tiebreaker with the Washington Wizards, giving the Pistons slightly better odds to finish with the No. 1 pick in the NBA draft. Both teams finished 29-53 this season. The Pistons will have 36 chances out of 1,000 heading into next month's lottery and Washington will have 35.