Philadelphia 76ers star Paul George suffered a hyperextended left knee early in the second half of Wednesday night’s 117-111 loss to the Memphis Grizzlies and did not return.

Sixers officials said further testing will be done Thursday. It was the same knee that George hyperextended in the preseason, forcing him to miss the first five games of the regular season.

The injury marked the latest setback for the Sixers, who had stars George, Joel Embiid and Tyrese Maxey together in the starting lineup for the first time. Maxey was back in action Wednesday after a six-game absence due to a hamstring injury.

George had just two points on 1-of-6 shooting with four rebounds and two assists in 17 minutes. Maxey also struggled from the floor, shooting 3-of-13 for eight points.

The Sixers have Thursday off before they host the Brooklyn Nets on Friday night.

Information from The Associated Press was used in this report.