Ovechkin pounced on Evgeny Kuznetsov's rebound and jammed the puck past Petr Mrazek for what would have been the equalizer. But the referees immediately signaled no goal and stuck with their call after further review.
The referees didn't explain the call on the ice, but the NHL's situation room quickly addressed the controversy.
"After reviewing all available replays and consulting with the referee, the situation room confirmed that Alex Ovechkin interfered with Peter Mrazek by pushing his pad, which caused the puck to enter the net," the league stated, as reported by Sportsnet's Elliotte Friedman.
Moments after the call, Justin Williams scored to extend the Hurricanes' lead to 4-2. Carolina added an empty-netter to secure the win and force a decisive Game 7.