Brendan Rodgers bemoaned Celtic's lack of clinical edge in a "game they were expected to win" after his side's draw with Motherwell.
It ended 1-1 at Parkhead after a late equaliser from John Obika. David Turnbull had given the Scottish champions the lead with a penalty, the host's second spot-kick of the afternoon after Luis Palma missed earlier on, but a finish from a corner by the visitors in added time meant the game ended all square.
And Rodgers was left frustrated by his team's lack of creativity. "We are disappointed because we had enough opportunities to win the game," he told BBC Radio Scotland.
"We had over 80 per cent of the possession so we had enough of the ball but did not create as much as we would have liked but still the opportunities we had were good ones.
"We need to see big moments through. [Penalties] are decisive moments in the game and are something we have worked on so we need to start bringing that into matches.
"We are disappointed to miss the first one but David scores the second one well and we were on top after that and controlled the rhythm of the game in their half.
"However, we gave away the corner and sadly we could not defend it. When the ball drops in the six-yard box we have to deal with it better."
The result means Celtic are nine points clear at the top of the Scottish Premiership ahead of Rangers taking on Aberdeen at Pittodrie.
And Rodgers acknowledged the draw with Stuart Kettlewell's side was a missed opportunity.
"These are games we should win, that we are expected to win but we have to earn that through quality and that little extra bit of finesse in the final third of the pitch and we did not have that today," he continued.
"We got into some good areas but lacked that final touch or pass to help us score. That little bit of freshness was maybe not there after the international break but that is no excuse.
"We have to show more than what we did today."
