CALGARY -- Calgary Flames coach Bob Hartley hopes they have a little bit of surprise left.

Trailing the Anaheim Ducks 3-1 in the best-of-7 Western Conference Second Round, Hartley is resolute heading into Game 5 at Honda Center on Sunday (10 p.m. ET; NBCSN, SN, TVA Sports).

"There's a full belief and my message is, 'Shock the hockey world,'" Hartley said. "That's what we're trying to do every day and it's nothing new to us. It's just rewind and press play. Playoffs, anything can happen, and especially in our situation. We want to keep going. This has been a great season for us. I know how resilient our players have been. It's not that we're down 1-3 or that we didn't win in Anaheim.

"We need to win one game. Let's win one game, let's bring it back to the 'C of Red,' and after this, let's see what happens. We need to win [Sunday] night, plain and simple."

A loss ends Calgary's season and puts Anaheim into the Western Conference Final against the Chicago Blackhawks. The Ducks haven't advanced to the third round of playoffs since winning the Stanley Cup in 2007.

Anaheim has won 21 straight games against Calgary on home ice, dating to Game 3 of their first-round Stanley Cup Playoff series in 2006. The Flames lost two games this regular season in Anaheim and were outscored 9-5. In Games 1 and 2, the Ducks outscored the Flames 9-1.

"All the history there, at some point you've got to win there," Flames center Mikael Backlund said. "Things are going to happen if you play well, and I think this year we haven't played a good full 60 minutes there. If we find a way to play a real solid 60 minutes, we have a chance to win.

"We have nothing to lose. We have nothing to lose this whole playoffs and it's going to be the same mindset [Sunday]."

Calgary led the NHL with 13 wins when trailing after the first period and were third when trailing after two periods with 10. The Flames have three wins when trailing after two periods in the playoffs.

"We've always found ways no matter our situation in third periods to come back and make games and win some games that way," Calgary defenseman Dennis Wideman said. "We have to approach it like that. We're going into this game with nothing to lose. We're going to throw everything at them and hope we come out on top."

Calgary had eight winning streaks of three games or more during the regular season.

After a 6-1 blowout in Game 1 and progress in the second half of a 3-0 loss in Game 2, the Flames won Game 3 4-3 in overtime before losing 4-2 on Friday.

"Game 1 we were not good," Wideman said. "The second half of Game 2 we were better. We were better again in Game 3. We won that one. And I think that last game was our best one. We just didn't get the goals when we needed them. Probably 5-on-5 that was our best game of the series.

"Funny how it works. Sometimes you play your best game and you don't get the result that you want. If we keep playing that way, keep playing that forecheck game, keep coming at them, we'll have a chance to win.

"I think we've got a group that's confident in ourselves and what we can do, and I think the whole year the media and fans were shocked at what we were able to accomplish. Within ourselves we believed we'd be in the playoffs from the start of the year.

"We're going into this game and we're planning on winning."