In 2016, Pittsburgh lost Game 1 of the second round before winning three straight games by one goal, including 3-2 in overtime in Game 4. the Capitals won 3-1 at home in Game 5, but the Penguins won the series with a 4-3 overtime victory in Game 6.
"I think they have similar personnel," Penguins coach Mike Sullivan said. "Their core is still intact. They're a really good hockey team, very much like our team. So I don't think there are drastic differences. I think they're a little more evolved. They're a little bit more mature, as our team is.
"Other than that, I think they're a very competitive team, as they have been year in and year out with the core of players that they have."
Capitals forward Alex Ovechkin is obviously a large part of that core. He had eight points (five goals, three points) in six games, including two goals in Game 6, against the Columbus Blue Jackets in the first round.
After holding Ovechkin to two goals in seven games during the 2017 series, the Penguins still expect him to be a matchup nightmare.
"He's a pretty big threat out there," Letang said. "Anytime you can do a job against him, and do it right, it's pretty satisfying. He's really tough. He's a big task. He's a big body. He's physical. He has a big shot, obviously. We all know that."