Celtic are nerve-shredding and spine-tingling in equal measure – and with a bit of fortune, they lead AZ Alkmaar after pulsating Parkhead night

Celtic supporters must have felt they were chomping on their major organ for an early supper, so often would hearts have been in mouths across their team’s exhilarating 2-0 victory over AZ Alkmaar in the clubs’ Europa League play-off first leg...