Nick Evans inspired a young Harlequins side to victory as they secured a home draw in the semi-finals of the LV= Cup following a 23-7 triumph over Cardiff Blues.
The former All Blacks fly-half contributed 18 points with a try, two conversions and three penalties as Quins overcame a Cardiff side that had beaten the London team in their last five meetings.
Evans and scrum-half Karl Dickson, standing in for England's Danny Care, formed a half-back pairing which ripped Cardiff apart as Harlequins finished the LV group stages as the only side with a 100% record from their four qualifying games.
Victory enabled Quins to overhaul Bath, 26-12 winners at Leicester 24 hours earlier, and finish top of Pool 4 while Cardiff failed to qualify from Pool 1 of the Anglo-Welsh competition whose fixture format sees clubs play opposition from other groups.
Twenty-year-old winger Sam Smith, with his seventh touchdown in six first-team matches this season, scored Harlequins other first-half try as they wiped out an early 7-0 deficit to lead 17-7 at half-time.