TORONTO — William Nylander took a pass from John Tavares and wheeled towards the net. The Maple Leafs winger then deftly fed the puck against the grain on a tee for Mitch Marner to blast a one-timer from a sharp angle. The power-play sequence was only a practice drill. It was also one of many positive signs for the player — and a team that's opened the playoffs minus one of its key contributors. Nylander appears on course to join the action Saturday for Game 4 against the Boston Bruins with Toro