Harlequins will put their unbeaten record this season on the line when they host the four-times Heineken Cup champions, Toulouse, at the Twickenham Stoop on Friday night.
The English Premiership side are still the only side who have an impeccable winning record this season, having won all 12 games in their domestic and European competitions.
But something will have to give when the French giants visit the English capital, with both teams unbeaten in Pool 6 and looking to secure qualification for the knockout stages of the tournament.
Toulouse, the moist successful side in the Heineken Cup and the aristocrats of French rugby, have recorded two impressive, if unspectacular, wins over Gloucester and Connacht to put themselves in top of their Pool.
The 'Quins, who lifted the Amlin Challenge Cup in Cardiff last season, have been the talk of English and European rugby with their perfect start of the season and have made no secret of their ambitions to in this seasons Heineken Cup.