Ennis took out Green in the lead-up to Cheyse Blair's try in the Storm's 26-6 victory at AAMI Park.
Ennis floored Green with what appeared to be a marginally late shoulder charge after he had passed the football.
Green stayed down for a few minutes and was attended to by Storm medical staff but recovered to play out the match.
Cronulla coach Shane Flanagan said post-game that he had spoken to the 32-year-old and believed Ennis would be in the clear which would be a huge boost for the Sharks given his form and experience.