Vladimir Tarasenko thought he had his second goal of the night after a beautiful feed from linemate Jori Lehtera, until the Chicago Blackhawks challenged the goal to see if the Finn was offside.
While many thought the play was too close to call, it was eventually ruled Lehtera was offside as he lifted his left skate off the ice just a fraction of a second before the puck crossed the blue line, and the goal was disallowed.
Moments later, Tarasenko received a two-minute minor for slashing, and the Blackhawks went on to score on the subsequent power play, as Andrew Shaw was credited with the goal, after another video review went Chicago's way.
Related: Shaw's late goal upheld on coach's challenge
Artemi Panarin added an empty-netter and Kevin Shattenkirk answered with 1.1 seconds remaining as the Blackhawks held on to even the series with a 3-2 win.
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