Mike Green took part in the Capitals' morning skate and said he felt good, but both he and Coach Bruce Boudreau are unsure if the defenseman will be in the lineup against the San Jose Sharks tonight at Verizon Center. Green was struck in the head, near his right ear, by a puck against Pittsburgh on Sunday and after the game said he had a headache and felt woozy, symptoms that when following a blow to the head are consistent with a concussion. "I don't know yet, I have to talk with the trainers," Green said. "We'll see. I felt good on the ice and [I'll] see what they say. If it was serious I don't think I'd be out there today. It is what it is. I have to make sure I'm smart about it, obviously, but I feel good out there." Said Boudreau: "I don't know if he's going to play. Yeah, he's feeling a lot better, which is a good thing. He's got to go through some tests and then we'll see how he feels tonight, after going through tests and after going through a practice and things. If there's any, any doubt at all, he's not going to play. If he's got the green light and he's 100 percent, we'll play him." In other news, Alexander Semin is expected to return to the lineup tonight after missing 12 games with a groin muscle injury. Semin, who recently signed a one-year extension worth $6.7 million, was on a 14-game goal-scoring drought before he took time off to heal. Boudreau said that was likely in part to the winger playing hurt several weeks prior to his absence.