FBL-SCO-CELTIC-RANGERS

Celtic fans hold up team flags in the stands during the UEFA Champions League group stage football match between Celtic and Barcelona at Celtic Park in Glasgow on November 23, 2016. The "Old Firm" derby between the Celtic and Rangers, whose 404th edition is scheduled for December 31, 2016 in Glasgow, is one of the most intense in Europe and reflects the violence of a city cut in half. / AFP / PAUL ELLIS / TO GO WITH AFP STORY BY ALISTAIR WATSON (Photo credit should read PAUL ELLIS/AFP via Getty Images)