Moritz Jenz headed a late debut goal as Celtic were again made to work in Dingwall as they beat Ross County 3-1. Kyogo Furuhashi gave Celtic the lead in the 48th minute but Alex Iacovitti levelled with Ross County's first effort on target 10 minutes later.
Malky Mackay's side looked like they might frustrate their visitors but Jenz ran in to meet Jota's inswinging cross and head into the roof of the net from six yards in the 84th minute.
Substitute Liel Abada wrapped up a 3-1 win in stoppage-time when he curled home from 18 yards. On-loan Lorient defender Jenz had only been drafted in after Stephen Welsh dropped out through illness on Friday.
The 23-year-old German picked up a booking in a shaky moment in defence but looked assured on the ball and made himself an instant hero with the crucial moment of the game on a ground where Celtic needed an Anthony Ralston winner in the seventh minute of stoppage time last season.