Radko Gudas, for reasons unknown to man, threw a low hip (knee?) check on Sean Couturier today in practice and it was captured by 6 ABC, which reports that Couturier limped off with a trainer:

I think the responses to this all sum it up:

We’ll update you when we know more about Couturier.

UPDATE: Upon further inspection, there were two pucks and this was two separate drills. Doesn’t look like it was an intentional hit.