That level of performance will be required again at the Stade de la Beaujoire in Nantes if Conor O'Shea's men are to defy the history books and become the first team to lose their opening two pool games and still qualify for the knock-out stages. Quins are currently bottom of the pile, but, in a highly-competitive group, lie just four points behind pool leaders and unbeaten duo the Scarlets and next opponents Racing Metro.
The English side, who won all six of their group games last season to reach the quarter-finals, are likely to face British & Irish Lions scrum-half Mike Phillips, who could make his Racing debut after joining the French outfit on a two-and-a-half year deal earlier this week. Following the 31-year-old's departure from Bayonne, Phillips started three of Wales' four internationals during November and will face a battle for the number nine shirt against Maxime Machenaud.
Phillips joins Welshmen Jamie Roberts and Dan Lydiate at the Paris-based club and could be reunited with Lions half-back partner Jonny Sexton.
Racing are also in decent form following their 17-12 win over Montpellier last weekend, their second home Top 14 victory in a row.
This is the first meeting between the sides in the Heineken Cup.