What happened: The Anaheim Ducks beat the Edmonton Oilers in overtime in Game 4 of their first-round playoff series. Despite a goal from Evan Bouchard that briefly put Edmonton ahead, Cutter Gauthier and the Ducks rallied for the win. The Oilers, reigning back-to-back Western Conference champions, now trail 3-1.

Why it matters: Anaheim is one victory from a stunning upset over the defending champs. Edmonton's early playoff struggles threaten their dynasty run.

What to watch: Game 5 pits desperate Oilers against surging Ducks on the road.