What this means for the Penguins : After winning the past two games, they have a chance to take complete control of the series by winning Game 4 on Friday.
What this means for the Lightning: Other than Vasilevskiy, they have had few answers for the Penguins during the past two games. If they don't find some soon, this series could get away from them quickly.
Key moment: Despite thoroughly outplaying the Lightning in the second period, it appeared the Penguins would have to settle for a 0-0 tie after 40 minutes until Hagelin's rebound goal with 10 seconds left in the period. It started with an offensive-zone turnover by Tampa Bay's Jonathan Drouin, who tried to pass back to defenseman Victor Hedman but gave the puck away to Kessel to start a 2-on-1 rush in the other direction.
Vasilevskiy made a right pad save on Kessel's shot from the right circle, but left a rebound in front that Hagelin put into the net for his fifth goal of the playoffs. The goal came on the Penguins' 31st shot on goal of the game and 21st of the period.
Unsung player of the game: Evgeni Malkin ended his point drought at six games by earning an assist on Crosby's power-play goal midway through the third period and was a force playing alongside Crosby for some even-strength shifts.
What's next: Game 4 is at Amalie Arena on Friday (8 p.m. ET; NBCSN, CBC, TVA Sports).