Green left near the end of the third quarter of Golden State's season-opening, 122-121 loss to the Houston Rockets on Tuesday.
Green didn't return, and he said his knee was "very sore" after the game. However, he added, "I'll be good. I'm fine," with regard to his status, per Haynes.
Prior to exiting Tuesday's contest, Green registered nine points, 13 assists and 11 rebounds. The Dubs were also a plus-seven when he was on the floor, while bench forwards David West, Jordan Bell, Kevon Looney and Omri Casspi failed to land in the plus at all.
Green is a two-time All-Star as well as the reigning NBA Defensive Player of the Year. Last season, he averaged 10.2 points, 7.9 rebounds, 7.0 assists and an NBA-best 2.0 steals per game.
If Green misses any additional time, West, Bell and Looney will likely see increased minutes.
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