Alfredo Morelos was sent off for the seventh time in his Rangers career but Nikola Katic's header secured victory over Celtic.
Karamoko Dembele and Scott Robertson each impressed Neil Lennon on their European bows for Celtic
Fraser Forster saved a penalty from Alfredo Morelos as Celtic edged out rivals Rangers in the Scottish League Cup final.
Rangers squandered a host of glorious opportunities as Christopher Jullien's goal helped Celtic to a slender 1-0 win at Hampden Park.
Celtic proved they should never have been an "afterthought" leading into the Old Firm derby, Neil Lennon said after beating Rangers.
Celtic inflicted a first defeat of the season on rivals Rangers after goals in each half at Ibrox from Odsonne Edouard and Jonny Hayes.
Celtic boss Neil Lennon refused to look for excuses after his side lost to CFR Cluj in Champions League qualifying.
James Forrest opened his goal account for the new season with a fine first-half strike in Celtic's 1-1 draw at CFR Cluj.
Celtic manager Neil Lennon conceded Kieran Tierney's head has been turned by interest from Arsenal, who have had two bids rejected.
Arsenal are reported to have had bids rejected for Kieran Tierney and Neil Lennon is determined not to allow him to leave on the cheap.