Neil Lennon urged his shot-shy players to turn chances into goals following their 2-0 SPL win over bottom side Dundee at Parkhead.
Strikes by Gary Hooper and Victor Wanyama gave the home side three welcome points but the victory would have been more comprehensive had it not been for former Hoops goalkeeper Robert Douglas and some poor finishing.
The 40-year-old Dees number one had a fine match, brilliantly saving a Scott Brown penalty in the 38th minute - only to be beaten just before the break when Hooper hammered in from 10 yards.
Wanyama fired in from distance after four minutes of the second half and after that the home side were in complete control but continued to spurn numerous opportunities, with Hooper hitting the post.
Lennon, asked about the missed chances, replied: "It is a concern for me.
"What isn't a concern is the chances that we are creating, because we are doing that on numerous occasions in games - but I would like to see us start putting a few more away.
"We lacked a little quality at times in the final third but the build-up play was pretty good and defensively we looked pretty comfortable all afternoon.
"It was a good performance, a clean sheet and three points which is what I wanted.
"There was a good tempo to the game. We had to wait a wee while for the breakthrough but it was a quality goal from Gary after really good play between him and Scott.
"We got a great second goal in the second-half and I felt after that it was one-way traffic and the only disappointment was we didn't get more goals."
Lennon joked about the performance of former Celtic team mate Douglas:
He smiled: "I will have him by the neck later on for making my day uncomfortable.
"I thought he was excellent. It took two quality goals to beat him today.
"I thought Gary was unlucky with the one that hit the post, he took a great first touch but Rab made some fine saves, especially in the second-half."
Dundee boss Barry Smith paid tribute to Douglas, saying: "Rab has done extremely well for us all season.
"He gets a lot of plaudits and maybe a lot of people give him some stick but at 40 years of age, producing performances week in, week out is difficult.
"For him to continue to do that is great for Dundee Football Club."
Smith claimed his side might have been denied a first-half penalty when defender Gary Irvine went to ground after going past Emilio Izaguirre in the Hoops box.
The former Celtic defender said: "I think that Gary Irvine was possibly tripped going into the box.
"I haven't seen it but I think it would be strange for him to go into the box and go down as easily as he did (had he not been touched).
"Gary said he was clipped but I can't say anything until I see it for myself."
Smith mourned John Baird's missed chance from 12 yards when the game was goalless.
He said: "If we take the chance then it is a different game.
"That is the chances you have to take at Celtic Park.
"They don't come that often so you have to take them.
"Obviously when Robert makes the penalty save, you think maybe something will turn again but unfortunately for us it didn't."