Scottish Premiership champions Rangers saw off Celtic 4-1 on Sunday afternoon to remain unbeaten in the league this season.
Kemar Roofe opened the scoring after 26 minutes but Odsonne Edouard quickly equalised despite Callum McGregor having been sent off for the visitors.
Alfredo Morelos restored Rangers' lead a few minutes later, Roofe scored the third goal shortly before the hour mark and Jermain Defoe rounded things off in stoppage time.