The 76ers could have a center shortage in Sunday night’s game against the Oklahoma City Thunder.

Reserve Andre Drummond is listed as doubtful with a sprained right ankle for contest at the Paycom Center, while Joel Embiid is questionable with right knee soreness.

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Embiid finished with 19 points, eight rebounds, four assists, four blocks, two steals, and three turnovers in Friday night’s home-opening loss to the Brooklyn Nets. Drummond finished with four points, 10 rebounds, two assists, two steals, two blocks, and one turnover.

Power forward Georges Niang or second-year power forward/center Paul Reed could be options to start if Embiid and Drummond are unavailable to play. Niang and Drummond were signed this offseason to provide front-court depth.

Shake Milton (right ankle), Ben Simmons (personal reasons) and Grant Riller (left knee) will remain sidelined for the Sixers (1-1). The Thunder (0-2) have lost their two games by an average of 27 points.

Following Sunday, the Sixers will complete their two-game road trip against the New York Knicks on Tuesday at Madison Square Garden.