The Tampa Bay Lightning dropped the opener of their Eastern Conference Semifinals series against the New York Islanders but swept the Islanders over the next four games. Only the Pittsburgh Penguins are now between them and a back-to-back appearance in the Stanley Cup finals, and I think the Lightning are undervalued in Friday's match-up.

Here are my keys to the game:

1. Recent Meetings - The Lightning swept the three-game regular season series with Pittsburgh, including a 4-2 victory at Consol Energy Center on Feb. 20.

2. Special Teams - The Pens power play unit is 11-for-40 in the first two rounds and they scored two goals on the man advantage when they eliminated Washington with a 4-3 OT win on Tuesday. The Lightning's have however killed off a NHL-best 88.4 percent of their shorthanded situations in the playoffs.

3. X-Factor - Tampa Bay's Tyler Johnson has two goals and four assists in his last four games. He tallied two and set up another three goals in the three regular season meetings with Pittsburgh.

Selection: This is a play on the Tampa Bay Lightning +1.5 (5*)