Will Greenwood gives his pool-by-pool preview for this season's European Rugby Champions Cup.
Pool One
Teams: Saracens, Ulster, Toulouse, Oyonnax
Pool Two
Teams: Clermont Auvergne, Ospreys, Exeter Chiefs, Bordeaux-Begles
Pool Three
Teams: Glasgow Warriors, Northampton Saints, Racing 92, Scarlets
Pool Four
Teams: Stade Francais, Munster, Leicester Tigers, Benetton Treviso
Pool Five
Teams: Bath, Toulon, Leinster, Wasps