Conor Hourihane’s 88th minute strike won the match at The City Ground and Montanier knows The Reds face a battle to keep away from the bottom of the table.
He said: “It was tough because I didn’t think we deserved the defeat. We played a very interesting second half but we have conceded a great goal at the end of the game. We didn’t play our top game but we played OK and it is difficult to take a defeat.
“We created a lot of situations but not a lot of chances to score, more than the opponent. We tried to push at the end of the game.
“We know that when you lose successive games in our position then you are close to the bottom. But we must continue and I think the team has a good mentality and we have had an unlucky period.”
Montanier is aware that questions have been raised about his future as head coach and with the January transfer window opening, he feels it is important that the potential takeover of the club is resolved quickly.
He said: “The most important thing is not my future, it is in the present with the team and to win the game. I am more focused on that than speculation about my position.
“We are waiting [for the takeover to be completed] and I hope the situation will be clear as everybody needs that. I haven’t had any contact with the new owners at this moment. It is not worrying for me as it is important that the situation needs to be clear before having that contact.
“I need to know the budget for example, as we have different targets, and for that we need to be clear for the situation at the club. I expect to know this month if we have a new owner or not and then we need to have a good discussion about the future.”