Leinster have past history with all three of their Pool 2 opponents in the European Rugby Champions Cup. Indeed, they lined out against two of them - London Wasps and Castres Olympique - in the last 13 months.
EUROPEAN RUGBY CHAMPIONS CUP - POOL 2:
Today's draw in Neuchatel, Switzerland saw top seeds Leinster placed in Pool 2 where they will battle it out with Castres and English sides Harlequins and Wasps.
The province beat Castres home and away in the 2013/14 Heineken Cup, their away win breaking the French club's year-long unbeaten home record.
Leinster last faced Harlequins in European competition on the way to winning the Heineken Cup in 2009. Back then they won a tight game at the Stoop by a single point to set up a Croke Park semi-final showdown with Munster.
Meanwhile, in April of last year, the Blues got the better of Wasps in a free-scoring Amlin Challenge Cup quarter-final. Five tries from Ian Madigan, Mike Ross, Isa Nacewa, Rob Kearney and Gordon D'Arcy all contributed to a 48-28 victory.
Giving his reaction to the Champions Cup draw, hooker Sean Cronin said: "Usually there's only one group of death, but they all look tough pools. We've got two trips to London which all the boys will be looking forward to.
"Hopefully there are a few Irish living in London who fancy coming along and giving us their support, as they did at Northampton last season.
"We had Castres in that pool as well. We played poorly at home and just squeezed out the win but did well out there when we knew it was do-or-die for qualifying.
"But they have since reached a second Top14 final in a row so that says everything about their strength. They may not be the first French team people talk about, but you don't reach two finals in a row and win the title without being a top-quality team."
Reflecting on Leinster's exit from the Heineken Cup at the quarter-final stage, he added: "We were disappointed with ourselves this season. We work so hard to progress from a pool that including Northampton, Castres and Ospreys and then felt we let ourselves down in the quarter-final at Toulon.
"Leinster have a proud tradition in Europe and it will be a huge focus for us next season. We are judged on winning trophies and it was great to lift the PRO12 title and send everyone off for the summer break with a huge boost but we want to prove ourselves again in Europe next season, even though it will be strange not to have Leo (Cullen) and Brian (O'Driscoll) on the pitch."
The inaugural European Rugby Champions Cup is set to explode into action in mid-October with two compelling weekends of heavyweight clashes between European club rugby's professional elite. Leinster, Munster and Ulster will all face English opponents in the opening round.
The two highest profile matches in the 2014/15 European club rugby calendar will be staged in the English capital following EPCR's announcement that London is set to host the finals of the new-look European Rugby Champions Cup and European Rugby Challenge Cup tournaments.
Rob Murphy caught up with Connacht prop Ronan Loughney to discuss the province's Heineken Cup round 4 loss to Biarritz Olympique, which was played in very wet conditions at the Parc des Sports Aguilera.
Speaking to Rob Murphy after Connacht's 17-0 defeat at Biarritz, head coach Eric Elwood said: "We ideally wanted to come here and build on last week's performance and play rugby. But when you have conditions like that, they become a great leveller and we had to go toe-to-toe with a heavyweight in their big pack. The effort and courage of the guys was magnificent though."
Speaking after Connacht's memorable 22-14 defeat of Biarritz Olympique, head coach Eric Elwood said: "We've shown a lot of faith in the young guys - if you play well, you'll stay in the team. Mick Kearney, Jason Harris-Wright, Dave McSharry and Robbie Henshaw...they were magnificent. They looked comfortable in that environment. That's what we're about, bringing those young, indigenous players through."
Connacht's Ireland-capped lock Mike McCarthy turned in a man-of-the-match performance as the province downed French giants Biarritz Olympique at the Sportsground. He spoke to Rob Murphy after the famous 22-14 win.
ERC Chief Executive Derek McGrath spoke to Irish Rugby TV this week at the draw for the 2012/13 Heineken Cup pool stages. The final will take place at the Aviva Stadium on May 18 with the final of the Amlin Challenge Cup on May 17 at the RDS.
Connacht's retiring CEO Gerry Kelly spoke to Irish Rugby TV at the Aviva Stadium on Tuesday and gave us his reaction to the draw for the 2012/13 Heineken Cup pool stages. Connacht have been drawn in the same pool as old rivals Harlequins, French side Biarritz Olympique and new Italian team Zebre.
Irish Rugby TV spoke to Leinster CEO Mick Dawson immediately after the draw for the 2012/13 Heineken Cup pool stages. He gave us his reaction to Leinster being pitted against Clermont Auvergne, the Scarlets and Exeter Chiefs in Pool 5.
ERC Chief Executive Derek McGrath presents the 2012 ERC European Player of the Year award to Leinster full-back Rob Kearney. Afterwards, he spoke of his pride at being selected for the award and gave 'a huge thanks' to his team-mates, the coaching staff and backroom team.
Leinster head coach Joe Schmidt, captain Leo Cullen and full-back Rob Kearney spoke at the post-match press conference in the aftermatch of their third Heineken Cup final success in four years. With their European crown retained, Leinster will chase a prized double against the Ospreys next week.
Speaking after Leinster retained the Heineken Cup in the all-Irish final against Ulster, out-half Jonathan Sexton said: "I think the scoreline definitely flattered us. It was a really tough game, the Ulster boys and all of us were saying we've never been so tired. It was a good advert for Irish rugby and a great occasion for the support."
Ulster head coach Brian McLaughlin reflects on his final match in charge of the province - the Heineken Cup final defeat to Leinster - and hooker Rory Best also answered questions during the post-match press conference at Twickenham.
New Zealand prop John Afoa talks about Ulster bouncing back from their 42-14 Heineken Cup final defeat to Leinster at Twickenham. The prop praised the efforts of his team-mates and the vocal and colourful support provided by the fans.
Prop Mike Ross and team manager Guy Easterby preview Leinster's bid for their second Heineken Cup success in-a-row. Ross and his team-mates are gearing up to face provincial rivals Ulster in Saturday's final at Twickenham.
Centre Darren Cave is relishing Ulster's Heineken Cup final showdown with Leinster at Twickenham. He says he is 'very proud' to be representing the Ulster fans, recognising that he is 'just another supporter who is lucky enough to wear the shirt for a couple of years'.
Ulster hooker Rory Best talks about the build-up to Saturday's Heineken Cup final showdown with Leinster at Twickenham, and what it would mean to emulate the province's European title-winning heroes of 1999.
Ulster head coach Brian McLaughlin and captain Johann Muller give their thoughts ahead of the province's first European Cup decider in 13 years - they meet provincial rivals Leinster at Twickenham on Saturday.
The Aviva Stadium and the RDS will host next year's Heineken Cup and Amlin Challenge Cup finals respectively. Speaking at the announcement, IRFU Chief Executive Philip Browne said: "It will be a great rugby weekend. What better city to do it in than Dublin? We've a reputation for being good hosts and here's an opportunity for us to show it to the rugby world."