Neil Lennon admits Celtic will have to find another gear if they are to win the Old Firm derby against Rangers at Parkhead on Tuesday night.
The Hoops have bounced back from their shock Active Nation Scottish Cup semi-final defeat to Irn-Bru First Division side Ross County, and Saturday's 4-0 home win over Motherwell extended their winning run in the Clydesdale Bank Premier League to six games.
However, the Irishman warned: "They will need to step up again," Lennon said. "There were times when they were sloppy."
He added: "They gave the ball away in bad areas, were a bit ill-disciplined defensively and if you play like that against a team of the quality of Rangers, they will punish you.
"But it was another step in the right direction and it's good to go in on a run of six winning games.
"We are playing the champions on Tuesday night but I think we have enough quality to give Rangers a hard night."