How it stands All the pool permutations

Jan 12: Leinster v Toulouse, Bath v Wasps. Jan 20: Toulouse v Bath, Wasps v Leinster Jan 11: Gloucester v Munster. Jan 13: Exeter v Castres. Jan 19: Munster v Exeter, Castres v Glouc Jan 13: Lyon v Saracens, Glasgow v Cardiff Blues. Jan 19: Saracens v Glasgow, Cardiff v Lyon Jan 12: Ulster v Racing, Scarlets v Leicester. Jan 19: Leicester v Ulster, Racing v Scarlets The three best runners-up usually need 16 points, so even with Leinster hosting Toulouse in round five, both sides seem well placed to qualify. This is

Everyone is still alive in this most competitive of the pools. Unthinkably, Exeter can still make it despite failing to win one of their first three games. They

Lyon are out, but can still dent Saracens’ chances of winning the pool by beating them next month. Glasgow would then leapfrog the 2017 champions

Racing 92 seem on an irresistible surge. But Ulster’s maximum return from their Scarlets double-header keeps them in the hunt. A win against where the Gallagher Premiership woes begin. Wasps and Bath are too far adrift. They are definitely gone. host Castres before travelling to Munster and need two comfortable victories, ideally with four tries. Gloucester are after a similar return.

with a win against Cardiff Blues, who are also eliminated. The top two, who meet at Allianz Park in round six, should already have enough to go through.

Racing would take them to the last game – at Welford Road – with a good chance of a home quarter-final. Tigers need a miracle, Scarlets are gone.