Ronny Deila has demanded that his players develop a ruthless streak.
A fifth-minute strike from Anthony Stokes was all that separated Celtic from Motherwell on Saturday despite the Hoops dominating from start to finish.
Seven league wins on the bounce have taken Celtic into their customary position at the top of the SPFL but with just six goals from their last four league matches there are obvious grounds for improvement.
John Guidetti was the main sinner at Motherwell missing three great chances but almost every Celtic outfield player was guilty of cursed the performance of home goalkeeper Dan Twardzik.
Deila's high tempo pressing game is being taken onboard by his players but until they develop a cutting edge in front of goal they will always leave themselves open to the sucker punch.
"We have to show the confidence and skill, we have to work on these things in training to get back on track and score more goals," he explained stating that he was irritated by parts of the performance at Motherwell.
"The first 20 minutes was brilliant, we pressed well, we created chances and had total control. If we had done that for 90 minutes it would have been the game that we wanted.
"We should have scored more goals but that's a couple of games now that we haven't been effective enough, that will come back again. We should have killed the game much earlier.
"I was irritated that it was possible to lose a goal near the end. We're working every day to improve and I see signs that we're getting somewhere but we're not there yet, there's still a lot of work to do."
On Thursday, Celtic complete their Europa League campaign away to Dinamo Zagreb with their place in the last-32 assured.