Harlequins retained their position at the Aviva Premiership summit after recording a 22-9 win over Leicester.
The champions showed that they will not be giving up their title without a fight after emerging from a tight contest with a fine victory, their second consecutive success at the Welford Road venue.
The win was Quins' fourth on the bounce with Nick Evans kicking four penalties to keep the visitors ahead, after he also converted the only try of the match from Tom Williams on 20 minutes - a score which had given Harlequins the advantage following two early Toby Flood penalties.
Danny Care also chipped in with a drop-goal to give Quins a 13-6 half-time lead and although Flood, reduced the arrears with his third penalty early in the second half, the boot of Evans responded with two of his own to ensure his side maintained their unbeaten start to the campaign.
Quins have moved a point clear of Northampton at the top of the Premiership table, while Leicester now find themselves down in third after being unable to score a try for the successive games.
Pen: Flood 3
Pen: Evans 4
Leicester: 15 Scott Hamilton, 14 Niall Morris, 13 Matt Smith, 12 Anthony Allen, 11 Vereniki Goneva, 10 Toby Flood, 9 Sam Harrison, 8 Jordan Crane (c), 7 Julian Salvi, 6 Steve Mafi, 5 Geoff Parling, 4 Graham Kitchener, 3 Martin Castrogiovanni, 2 Tom Youngs, 1 Boris Stankovich.
Replacements: 16 George Chuter, 17 Dan Cole, 18 Logovi'i Mulipola, 19 Rob Andrew, 20 Thomas Waldrom, 21 Patrick Phibbs, 22 George Ford, 23 Adam Thompstone.
Harlequins: 15 Mike Brown, 14 Tom Williams, 13 Matt Hopper, 12 Jordan Turner Hall, 11 Ugo Monye, 10 Nick Evans, 9 Danny Care, 8 Nick Easter, 7 Chris Robshaw (c), 6 Maurie Fa'asavalu, 5 George Robson, 4 Olly Kohn, 3 James Johnston, 2 Joe Gray, 1 Joe Marler.
Replacements: 16 Rob Buchanan, 17 Darryl Marfo, 18 Will Collier, 19 Charlie Matthews, 20 Tom Guest, 21 Karl Dickson, 22 Rory Clegg, 23 Ross Chisholm.
Referee: David Pearson
Assistant referees: Robin Goodliffe, Gareth Copsey
Television match official: Trevor Fisher
Timekeeper: David Hudson