The top seeds won their first game against the Miami Heat, but the two-time defending champions have claimed wins in the last three, leaving them just one victory from securing a place in the NBA Finals.
The coach told reporters: "I think anytime you lose three in a row in the playoffs, it shakes your confidence some.
"But we can't worry about that. All we've got to worry about is coming back and winning game five and giving us an opportunity to come down here and win one game.
"We've won one game in each playoff series that we've played here the last two years. We should have confidence that we can do that."
The Pacers must win to keep their title hopes alive when they host the Heat later today.