In a media scrimmage, Keefe said that there were some line struggles in Game 3, hinting at a potential reshuffling for Game 4.
It isn't known what the specific line changes will be, but based on Keefe's comments, moves for the lines may be done from the first to the fourth.
Perhaps Keefe, as he has done in the past for Toronto, could work a complete overhaul of the Leafs lineup, trying to formulate the best lines for a win.
Keefe has not confirmed his lineups for Game 4, deciding to keep quiet about his decisions, leaving his plans up in the air for what he plans to do trying to push his team finally into the second round.