Callum McGregor scored late on to seal Celtic's 3-0 victory over rivals Rangers in the Old Firm Derby at Celtic Park on Sunday.
Daizen Maeda and Kyogo Furuhashi had put the Bhoys in control in the first half, with Rangers unable to mount a comeback.
Rangers' best chance came inside 10 minutes, with James Tavernier picking out Rabbi Matondo, who thumped his header wide from the edge of the six-yard box.
Kyogo thought he had broken the deadlock just one minute later, but his clinical finish was disallowed as Nicolas Kuhn had just drifted offside before teeing him up.
Maeda's close-range effort did count in the 17th minute, with Alistair Johnson drifting in behind Rangers' defence to set him up for a tap-in.
And Kyogo would get on the scoresheet just before the break, driving a low shot through the crowded area and in from 30 yards out to put Celtic in control.
McGregor added the gloss in the 75th minute, netting in a third straight game as his long-range strike deflected past Butland.
Data Debrief: Clement's derby woes go on
Celtic maintained their perfect start to the season, with the Bhoys yet to concede in their four games so far. Kasper Schmeichel only had three saves to make, staying alert to deny Tavernier and protect his clean sheet late on.
But it was more misery for Gers boss Philippe Clement, who has now failed to win an Old Firm Derby in five attempts in all competitions (one draw, four losses); only Graeme Murty (also five) and William Wilton (eight) also failed to win any of their first five games against Celtic in charge of Rangers.
As a whole, Rangers have not enjoyed their recent trips to Celtic Park - since the start of 2022-23, they have lost all five of their away games against Celtic. The last time that happened was in April 1980.
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