Rangers host Celtic on Sunday at Ibrox in the Scottish Cup fifth round .
Derby debuts beckon for Kris Commons , Freddie Ljungberg , and El - Hadji Diouf in the white - hot Old Firm atmosphere .
Rangers host Celtic on Sunday at Ibrox in the Scottish Cup fifth round , and derby debuts beckon for Kris Commons , Freddie Ljungberg , and El - Hadji Diouf in the white - hot Old Firm atmosphere .