Durant sustained the injury with 1:05 remaining in the third quarter when Jimmy Butler fell back into the Nets forward after having his shot blocked by Ben Simmons.
The 2014 NBA MVP remained in the game initially but appeared concerned by the knock and headed for the locker room when the Nets called a timeout 30 seconds later.
"He didn’t finish the game," Nets head coach Jacque Vaughn told reporters. "Just right knee, he'll get evaluated tomorrow. Then hopefully we'll have some more info for you.
"Most likely it will include imaging just to make sure we're good."
Durant had injured the MCL in his left knee in January last year, missing approximately a month and half while rehabbing.
The 12-time NBA All-Star is averaging 30.0 points, 6.8 rebounds and 5.4 assists this season for the Nets, who have rallied after a slow start to be 27-13 and second in the Eastern Conference.
"He's in good spirits as we all are," Nets team-mate Kyrie Irving said of Durant. "The strength of our team is us picking each other up.
"Just being ready for whatever's thrown at us... I think one of the greatest qualities of our team is our bench and the way we support each other, despite who's in the lineup.
"Now it's time to go out and exemplify that until we find out the timeline with K and when he could be available again. So we just got to be mature about it."