Celtic are back in Champions League action tonight against RB Leipzig, and tantalising excitement is in the air as the Bhoys search for a second league phase victory. Last time out, the Hoops’ 0-0 draw away to Atalanta took the reigning Scottish Premiership champions on to four points in their first three fixtures in the new format. In contrast, RB Leipzig arrive in Glasgow without a victory in their opening three matches following losses to Liverpool, Juventus and Atletico Madrid. As a consequence, Celtic sit 20th in the Champions League table, while tonight’s opposition will attempt to get o…