Rangers can't afford slip-up before huge derby double-header

[BBC]The news of Lawrence Shankland's prolonged absence is another bitter blow to Derek McInnes and Rangers.It follows the injury to fellow striker Youssef Chermiti and supporters will be even more keen to see recent big-money signing Kevin Kelsy quickly step up to the plate.Having said that, I wouldn't be too surprised if Ryan Naderi leads the line against St Mirren. He played well as Shankland's replacement on Saturday and also against the Buddies in the 5-1 League Cup win earlier in the seaso