Five penalties from Ben Botica and two from Louis Grimoldby were enough for Harlequins to see off Bath 21-12 at the Stoop.
In a try-less encounter, Stephen Donald scored three penalties and Tom Heathcote one of his own as Bath kept in the match, but the visitors slipped further away after Grimoldby's two kicks stretched the lead and handed Quins their second victory in the competition.
Meanwhile, a late penalty from Danny Cipriani was enough to give Sale a narrow 25-23 victory over Saracens at the Salford City Stadium.
There were two tries each for both sides as Mark Cueto and Fraser McKenzie crossed for the hosts, with Kameli Ratavou and Joel Tomkins doing the same for the visitors.
The result was only Sale's third win this season in all competitions.
Gilbert has released a new line of rugby cleats. The Gilbert Virtuo 8S is part of the exciting new product. Check it out.
The entire All Blacks apparel line has been updated for 2013/14. Check out the New Zealand All Blacks polo.
The Nike Tiempo is a solid rugby cleat and one of few styles still made from full-grain natural leather.
The Gilbert Blitz 8S rugby cleat is a great cleat at a great price of $69.99. Get a new pair of cleats today.
A cool looking all black rugby cleat with the high performance adidas is known for. Get in the Gear!
Wear the crest of the British and Irish Lions on your t-shirt. A great look for the summer.
The All Blacks Performance t-shirt is black with hints of blue from the training jersey. Very Cool.
The New Zealand All Blacks training jersey for 2013/14. Get in the Gear!
The USA Rugby Pro Alternate rugby jersey is perfect for any fan of the Eagles. Get yours to wear during the summer Test matches.
The NEW All Blacks 2013/14 jersey has arrived at World Rugby Shop. Dare to wear the colors of the All Blacks.