PHILADELPHIA (AP) Brett Brown gathered his team in the locker room to ring the postgame victory bell when the Philadelphia 76ers coach noticed a familiar face on general manager Elton Brand's phone. There was Joel Embiid on FaceTime, calling in from New York where he's set to have surgery Friday to repair a torn ligament. Embiid had to like the view -- a Sixers team that gutted out a win hours after learning the All-Star center was out indefinitely.

''We're going to miss Joel for however long it is,'' guard Ben Simmons said, ''but tonight was a good start.''

Josh Richardson scored 29 points, Simmons had 19 and Philadelphia won without Embiid, beating the Boston Celtics 109-98 on Thursday night.

Embiid will have surgery for a torn ligament in a finger in his left hand and will be evaluated in one to two weeks. Embiid, averaging 23.4 points and 12.3 rebounds in 31 games this season, tore the radial collateral ligament in the ring finger Monday night in a victory over Oklahoma City.

''I'm putting a blow torch, a bullet, many bullets into what we used to do,'' Brown said. ''Really. It doesn't fit. So it's on me to make it fit. We don't have Joel Embiid. So when I say, 'blow torch and bullet,' I mean it.''

Mike Scott slid into the starting rotation, along with Al Horford, Tobias Harris, Richardson and Simmons. Simmons, an All-Star point guard, played center at times and drew a charge on Enes Kanter with 1:45 left in the first quarter.

''I've always been curious of what that could look like,'' Brown said. ''I thought he was good. I don't know what the numbers bear out but it's something we tried. I have wanted to try Ben at five, we did, and I suspect we'll see it again.''

With Embiid out indefinitely, even the deep reserves are going to have to contribute to keep them afloat until he returns. That included Furkan Korkmaz, who buried a 3 late in the fourth that stretched the Sixers' lead to 91-87. Horford, who left Boston in the offseason to sign a four-year deal with Philadelphia, converted a three-point play for a seven-point lead. The Celtics pulled within two, but the Sixers used a 9-0 run to put the game away and improve to 18-2 at home.

''It's two big sports cities that really get behind their teams, so you appreciate that,'' Richardson said. ''I feel like everybody's almost ready to fight about that game when it comes up.''

The Celtics had their own injury scare when Kemba Walker, ejected for the first time in his nine-year NBA career a night earlier, sprained his left thumb. Walker ran into Scott and instantly clutched his hand late in the second quarter. Walker, who scored 26 points on 10-for-20 shooting, tried to shake it off but left for the locker room shortly before the Celtics took a 55-48 lead into halftime.

Walker, wearing a wrap in the locker room, said he jammed his thumb and didn't think he would need additional tests.

''When he first went down, we were worried about ligaments,'' coach Brad Stevens said. ''Right now, in a lot of ways, it feels like we dodged a bullet.''

Walker looked fine when he returned to the lineup. Jayson Tatum and Walker hit back-to-back 3s to tie the game at 69-all in the third and wipe out a hole caused by the Sixers' 11-0 run to start the half.

''We just have to close out games better,'' Walker said. ''You can't win 'em all, obviously. But we've got to be better.''

TIP-INS

Celtics: Smart hit his 500th career 3-pointer. He also hit a 3 to close the third and give the Celtics an 80-77 lead.

76ers: F Matisse Thybulle returned from a nine-game absence with a sprained right knee. The rookie averaged 4.8 points before he was hurt.

NEED FOR EMBIID

The 25-year-old Embiid has struggled with injuries ever since he was drafted with the No. 3 pick of the 2014 draft. He missed his first two seasons with foot injuries and hasn't played more than 64 games in any of the last three. They're 4-4 this season when Embiid sits out.

''This is not a 'woe is me' moment, not for me, at all,'' Brown said. ''And not for my players. We'll take what we have, and what we have, I love.''

LOSING THREE

The Celtics are on their first three-game losing streak of the season and have lost all three games to the Sixers this season.

''I'm just not as discouraged as I've been the last couple of days,'' Stevens said.

UP NEXT

Celtics: Host New Orleans on Saturday night

76ers: At Dallas on Saturday night.

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