Exeter failure to exploit early edge punished by Leinster’s Luke McGrath

• Pool 3: Leinster 22-17 Exeter• Exeter Chiefs face struggle to reach Champions Cup quarter-finalsPart of the Great English Humiliation last weekend, Exeter were one of those not quite disgraced then and here their dignity was way beyond reproach. Yet the cold truth is they return from Dublin with a defeat. England’s champions now face a fight outside the back door into the quarter-finals.Leinster were way below their best but like the champion team they are, of rather more experience and pedigree, they found their way to victory having ridden the loss of Johnny Sexton to a head injury in only…