Today it is the turn of Pool 2 to come under our Heineken Champions Cup spotlight, with the English pair of Exeter Chiefs and Sale Sharks being analysed along with Scottish side Glasgow Warriors and French club La Rochelle.
Ground: Sandy Park, Exeter, England.
European Cup record: Exeter have only reached the last eight of the European Cup once, back in 2016, when they were beaten 25-24 by Wasps in their quarter-final at the Ricoh Arena.
Last season: It was yet another frustrating campaign in Europe for Exeter, who went down 9-7 to Munster Rugby in their final Pool 2 match in Limerick, meaning they missed out on a spot in the last eight.
Director of rugby: Rob Baxter has been in charge at Sandy Park since 2009, having helped them win promotion from the Championship and become a major force in the Gallagher Premiership.
New signings: Scotland full-back Stuart Hogg will make a fast return to Scotstoun as Exeter have been drawn against his former side, Glasgow Warriors, in the pool stage. Other signings include former Scarlet Tom Price and fellow lock Will Witty, who has joined from Newcastle Falcons.
Ground: Scotstoun Stadium, Glasgow, Scotland.
European Cup record: The Scottish side have reached the quarter-finals on two occasions and have been beaten by Saracens in both last-eight matches.
Last season: Glasgow did enough to qualify as one of three best runners-up last season behind Saracens in Pool 3 but were beaten 56-27 by the English club when they met in the quarter-finals.
Head coach: Dave Rennie has been with Glasgow Warriors since 2017, having previously spent time with Hamilton-based Super Rugby side Chiefs, as well as the New Zealand U20 team.
New signings: Lock Andrew Davidson has rejoined Glasgow after a spell with recently-relegated Newcastle Falcons, while prop George Thornton has arrived from Wasps, having spent last season with Championship club Nottingham.
Ground: Stade Marcel Deflandre, La Rochelle, France.
European Cup record: La Rochelle’s maiden European Cup campaign in 2017/18 was a relative success, as they topped Pool 1 before being beaten 29-17 by Scarlets in the quarter-finals.
Last season: They were runners-up in the Challenge Cup, heading Pool 4, before beating pool rivals Bristol Bears 39-15 in the quarter-finals and Sale Sharks 24-20 in the last four. However, they couldn’t lift a first European trophy, falling 36-16 to ASM Clermont Auvergne in the final at St. James’ Park.
Head coach: Ronan O’Gara has joined the coaching staff at La Rochelle, taking over as head coach at the French club under director of rugby Jono Gibbes. He was previously with Super Rugby champions Crusaders.
New signings: Fly-half Brock James returns to La Rochelle next season, having spent a year with Bordeaux-Bègles. Other signings include Argentina hooker Facundo Bosch and Samoa flanker Faifili Levave.
Ground: AJ Bell Stadium, Salford, England.
European Cup record: Sale Sharks have reached the quarter-finals of the European Cup on one occasion, back in 2006 when they were beaten by Biarritz 11-6. They are two-time winners of the Challenge Cup, in 2002 and 2005.
Last season: Sale reached the Challenge Cup semi-finals last season, seeing off Connacht Rugby in the last eight before being narrowly beaten 24-20 by La Rochelle, who they face again in next season’s Heineken Champions Cup.
Director of rugby: Steve Diamond has held this position since 2012, having previously coached Saracens, the Russian national team and England Saxons.
New signings: England back-row forward Mark Wilson has joined on loan from recently-relegated Newcastle Falcons, while other notable signings include prop Jake Cooper-Woolley from Wasps, fly-half Robert du Preez from Super Rugby side Sharks and Newcastle full-back Simon Hammersley.