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."
Speaking after the 3rd/4th place play-off defeat to France, Ireland Women's head coach Philip Doyle said: "Semi-final of a World Cup, ranked fourth - I'm absolutely thrilled with that. It's one step, we've learned a huge amount at this World Cup. We'll put it in the bank now and hopefully, in three years' time at the next World Cup, another Irish team will be there (competing in the last-four)."
The Ireland squad got their first taste of the new Canterbury training kit with new sponsor Three on board. Check out the gear as Cian Healy, Tommy Bowe and Devin Toner give us their thoughts and register for updates on shop.irishrugby.ie.
Speaking ahead of the Women's World Cup semi-final against England, Ireland head coach Philip Doyle said: "We're really looking forward to it, it's going to be a great occasion. I'm sure it will be like any another massive game in that it's all down to percentages."
Relive all the drama and excitement of the Ireland Women's historic victory over New Zealand with Wyn Gruffydd's memorable commentary, the roar of the Irish fans in Marcoussis and Fiona Coghlan's inspiring post-match interview.
Taoiseach Enda Kenny has joined a host of political, sporting and broadcasting legends to send a message of support to the Ireland Women's squad ahead of the forthcoming Women's Rugby World Cup, which begins in Paris next Friday.
Speaking after the IRFU's Annual Council meeting, Chief Executive Philip Browne highlighted the importance of ticket revenue to the Union and also their sustained investments in the professional and domestic games.