Two of England's Heineken Cup quarter-finalists, Harlequins and Saracens, will go head-to-head in the top game in Europe this weekend when they clash at the Allianz Stadium on Sunday.
No fewer than nine of the England match-day 23 at the Millennium Stadium last weekend will be on display as the English Premiership pacesetters meet in a game that could decide who finishes at the top of the table.
Saracens welcome back their international contingent for Sunday's top-of-the-table clash. Alex Goode, Chris Ashton, Brad Barritt, Owen Farrell and Mako Vunipola all return to the starting line-up and they are joined by Scotland captain Kelly Brown.
And Saracens boss Mark McCall is expecting another tough battle against Quins, who they edged past (18-16) at the Stoop in September.
"Under the guidance Conor O'Shea, Harlequins have been one of the most consistent sides for the past 18 months," said McCall.
"It's a top of the table match and one that everyone connected with the club is looking forward to.
"We welcomed back the international players to the squad this week after international duty and there is a real buzz around the club.
"The depth of the squad has been tested in the past few months and we have come through that well, giving us competition for places across the pitch. That is exactly what we want."
Meanwhile, reigning champions Harlequins welcome Mike Brown, Danny Care, Joe Marler and captain, Chris Robshaw back into their starting line-up following England duty.
The Twickenham outfit have wobbled in recent Premiership rounds but will be a different proposition with their international stars back on the pitch.
Saracens are currently unbeaten at Allianz Park and they have not lost at home since their Heineken Cup quarter-final defeat to Clermont Auvergne last April.
With their clash with Ulster, at the same stage, just two weeks away the Premiership showdown will serve as the perfect preparation.
Harlequins have conquered their fierce rivals just once in their last seven attempts but they will be looking to turn the history books on their head ahead of their knockout clash with Munster on April 7.
Saracens: Goode; C Ashton, J Tomkins, B Barritt, D Strettle; O Farrell, R Wigglesworth; M Vunipola, S Brits, M Stevens, S Borthwick (capt), A Hargreaves, K Brown, W Fraser, E Joubert.
Replacements: J Smit, N Auterac, P du Plessis, G Kruis, J Wray, N de Kock, C Hodgson, C Wyles.
Harlequins: M Brown; U Monye, M Hopper, J Turner-Hall, S Smith; N Evans, D Care; J Marler, J Gray, J Johnston, C Matthews, G Robson, T Guest, C Robshaw (capt), N Easter
Replacements: R Buchanan, M Lambert, W Collier, M Fa'asavalu, L Wallace, K Dickson, B Botica, G Lowe.
The directors of ERC voted unanimously at a Board meeting to postpone all decisions including the release of further instalments of ERC's distributable central revenues to the six shareholder countries until 19 February next when the Board will meet again to reconsider the issue.