Danilo Gallinari suffered a sprained left knee in New York's victory over Indiana on Sunday afternoon.
X-rays were negative and he will go in for an MRI on Monday.
Gallinari said he felt some "stretch and a little click" on the side of his knee.
"There's nothing to worry about," he said. "I felt a lot of pain right after the guy fell on my knee. But when I started to walk, the pain started to go down. Actually right now it's (just) discomfort."
Gallinari Sprains Knee In Victory