The Blackhawks killed Duncan Keith's slashing penalty with 1:56 remaining in overtime.
"Some unbelievable blocks by our guys [on the penalty kill]," Subban said. "I think the boys flexed out and [were] willing to block shots. Just the willingness to block shots there is unbelievable and goes a long way. If you want to win and continue to win, you've got to block shots like that. It helps me out a lot; it helps the goalies out a lot."
McElhinney made the save against Patrick Kane on a breakaway 28 seconds into overtime, then Subban made the save against Point on a breakaway 13 seconds later.
Kane and Adam Boqvist each had two assists for Chicago, which is 4-1-1 in its past six games. Ondrej Palat had two assists for Tampa Bay.
"We have to continue to try and stay out of the penalty box," McDonagh said of Tampa Bay's five penalties. "We've had a good run on the [penalty kill], but you give a team like this, I think they have the No. 1 power play (No. 2, behind Toronto Maple Leafs), enough looks, it can change the momentum of a game. I think that's one area we can get better at and be disciplined [at], it's staying out the box. This is a tough challenge, we have one more crack at them in a couple days, and it should be a good one again."
NOTES: Lightning defenseman Jan Rutta was a late scratch with an upper-body injury. He is day to day. … Blackhawks defenseman Calvin de Haan left the game at 2:43 of the third period after he blocked Palat's shot. … Boqvist has three multiassist games in his past five.