There are concerns that Suns forward Cameron Johnson may have torn the meniscus in his right knee, tweets Shams Charania of The Athletic. Tests have indicated that the meniscus is injured and Johnson is undergoing further evaluation, Charania adds.

Johnson has been ruled out for Saturday’s game after hurting his knee in the first quarter of Friday’s loss to Portland. He was able to walk to the locker room under his own power, but he left the arena on crutches, according to Duane Rankin of The Arizona Republic.

Johnson appeared to suffer the injury while turning to get back on defense, Rankin adds. He is coming off a productive week, averaging 21.3 PPG in his previous three games, including a 29-point outburst Tuesday.

Johnson, who moved into the starting lineup on a full-time basis this season, will be a free agent next summer after not reaching an agreement on a rookie scale contract extension before the Oct. 31 deadline.