The Calgary Flames might have a lineup change because of the illness of an undisclosed forward. "Our roster isn't completely set yet tonight [for] how we're going to play, because we do have a guy who's sick up front," coach Glen Gulutzan said. "We're not going to say who that is, but all these guys in here know that our lineup that will be posted is tentative based on how one guy is feeling coming back to the rink." The forward lines were different during the morning skate than in Calgary's 3-1 loss to the Washington Capitals at Scotiabank Saddledome on Sunday, but it's unclear if any changes will stick. If rookie Matthew Tkachuk plays, it will be his ninth game, and then the Flames must decide whether to continue playing him or send him back to London of the Ontario Hockey League to delay the start of his entry-level contract. Tkachuk has one goal and four points in eight games, including an assist in three straight games. "We're right at the nine-game mark," Gulutzan said. "He's done everything, in my mind, he can do. He's handled himself, he's done what he can and we'll just see what transpires in the next few days." Goalie Brian Elliott, who defeated the Chicago Blackhawks 3-2 in a shootout at United Center on Oct. 24, will start in net.