The Toronto Maple Leafs are likely to be without centre Mikhail Grabovski for their highly anticipated matchup with Montreal on Saturday night at the Air Canada Centre. The team said Friday morning that Grabovski remained in New York following the club’s shootout loss to the Rangers Thursday night. Grabovski underwent tests and examinations for a stomach ailment that he has been dealing with for over two years now. Leafs coach Randy Carlyle said Grabovski has suffered from “gastrointenstinal” problems that have left him with heart burn and other pains. Grabovski has lost weight as a result of the ailment, Carlyle added. Grabovski is scheduled to return to the Toronto on Friday night, but his status for Saturday’s game is questionable at best. In the meantime, Carlyle and star winger Joffrey Lupul confirmed Friday that the player has been suffering from a concussion.