Brendan Rodgers was unimpressed by the decision to disallow two Celtic goals against Ross County.
The Scottish champions ran out 3-0 winners in the highlands thanks to strikes from David Turnbull, Luis Palma and James Forrest.
Liam Scales thought he had put the visitors in front in Dingwall but his finish was chopped off after Oh Hyeon-gyu was judged to have fouled a Ross County player in the build-up.
Then South Korea international himself then had a goal disallowed when Daizen Maeda was ruled to be offside before playing in the cross.
And while Rodgers was pleased with his side's performance, he feels they unfairly missed out on a higher scoreline.
Speaking to Sky Sports, he said: "I thought we created a lot of chances and had some goals disallowed that I would need to see again, especially the offside and even the one before that early on.
"You have two guys jumping for the ball and the ball lands and we finish, and it is not given as a goal. I did not see that as a good decision, but the guys kept going and persevering."
The Northern Irishman made six changes from the side that defeated St Mirren midweek and he was keen to stress the importance of squad management ahead of the trip to Spain to face Atletico Madrid in Champions League action.
"It is just about trying to manage the game time of the players just to make sure we are as fresh as we can be," he continued.
"With all the changes it was a little bit slow at times I felt but in the main we had some really good combination play.
"You are never totally comfortable in the game till you get that second goal."
