Rangers chairman Dave King cannot seem to stop talking about Celtic these days.
Celtic have made Scott Bain's loan move permanent, and the goalie admits the Rangers clash played a huge role.
Some have questioned Rangers for appointing the inexperienced Steven Gerrard as manager.
Rangers have failed to strongly challenge Celtic in recent times.
Celtic strolled to a 5-0 win over Rangers on Sunday, and Scott Brown has singled out a brilliant partnership for praise.
Celtic have won the last six Scottish Premiership titles, and will make it seven with a victory on Sunday.
Rangers head into Sunday's Old Firm clash on the back of a victory.
Celtic can wrap up a seventh consecutive league title with a win over Rangers on Sunday.
Rangers are winless in 10 Old Firm games against Celtic.
Andy Halliday was withdrawn four minutes before the interval with Rangers 2-0 down against Celtic.
The former Celtic star believes Rangers should never have been demoted to the bottom division.
The midfield battle was won by the Rangers star against Celtic.
The talented midfielder was signed from Inverness in the summer.