Pittsburgh Penguins captain Sidney Crosby is seeking clarity from officials after Tuesday's loss to the Boston Bruins.

The tightly-contested clash between division foes featured two hits - one by each team - causing injuries, but referees only deemed Brandon Tanev's blow illegal.

The Penguins forward received a five-minute major and was ejected in the second period for the following hit on Bruins blue-liner Jarred Tinordi.

Tinordi's hit on Evgeni Malkin in the opening frame went uncalled by refs.

"I hope as players we get some clarity on what's a good hit and what's not," Crosby said postgame, per Seth Rorabaugh of the Pittsburgh Tribune-Review. "It's tough to really gauge when you're out there. I know it's fast, but right now, it's really hard to know what is, in fact, clean and what's not. And when you're out there playing, it's important to know that."

Both Tinordi and Malkin left the game with injuries. There's been no update on either player's status, but Crosby made it clear he hopes the Bruins defender isn't seriously hurt.

"I don't think he (Tanev) had any intent there," Crosby said. "I hope Tinordi's OK. He went in pretty awkward. But I don't think there was any intent. I thought he hit him clean. He hit him timely as far as the puck being there. (Tinordi) did go in awkwardly, so you never like to see that. But I didn't think it warranted a five-minute (major penalty)."

Boston won the game 2-1. The Bruins sit in fourth place and trail the Penguins by three points in the East Division with two games in hand.

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