Scottish League Cup holders Celtic eased past Partick Thistle and into the semi-finals amid more fan protests against the club's board.
There were loud chants of 'sack the board' ahead of kick-off, but the Hoops' support were fully behind the players as they extended their unbeaten domestic run.
Hyun-Jun Yang's glancing header opened the scoring at Firhill with Liam Scales doubling their lead to all but wrap things up before the break.
Sebastian Tounekti's first Celtic goal put the tie out of reach for the Jags just after the break, with Luke McCowan coming off the bench to slam in a fourth late on.
The Hoops join Rangers, Motherwell and St Mirren in the last four - the ties will be played at Hampden Park on November 1 and 2.
More to follow.