Jimmy Floyd Hasselbaink may be at the centre of a Football Association inquiry after an elbowing incident in the FA Cup win at Scarborough.
Scarborough's Mark Hotte was floored after clashing with Hasselbaink in Chelsea's 1-0 fourth round victory.
Referee Barry Knight missed the incident and the FA's video review panel is set to conduct a review.
Knight said: "If I'd seen a deliberate elbow, it would have been violent conduct and a sending off."
The FA may also review a similar incident involving Chelsea debutant Alexis Nicolas, who clashed with Scarborough's Stephen Capper.
Hotte was also hurt in a clash of heads with Eidur Gudjohnsen.
He said: "I got bashed a couple of times but I think I enjoyed it in the end. I get bashed every week, but getting bashed by Hasselbaink and Gudjohnsen is a bit different.
"I got Jimmy's shirt and he said 'you deserved it', but I'm not sure what he meant by that."