Ronny Deila has admitted that he was left feeling frustrated after Celtic were held to a goalless draw at home to Ross County.
The Hoops were unable to break down their stubborn bottom-placed opponents at Celtic Park, despite taking command of the possession stakes.
Speaking after the stalemate, Deila told reporters: "It was a very frustrating game. We had the ball for 90 minutes but didn't manage to break them down and get the tempo up.
"With so much possession, we need to create more and that's what's disappointing today. It's learning to deal with teams like this but it's not the last time we're going to meet a side that will sit in.
"I understand the fans' frustration. I am frustrated too. We have created a lot of chances this year but this time we didn't manage to score. That's the disappointing part."
Celtic, who remain five points clear at the top of the Scottish Premiership table, return to action on New Year's Day when they take on Partick Thistle.
