Leinster kept alive their hopes of retaining the Heineken Cup with victory over Exeter on Saturday, but Northampton's dreams are over.
Two tries in a seven-minute spell early in the second half kept Leinster's hopes of remaining in the Heineken Cup alive, but they were forced to battle hard to beat newcomers Exeter 29-20 in their Pool Five clash at Sandy Park.
The reigning champions will have to wait until Sunday to see if they or Munster, who welcome Racing Metro, progress to the quarter-finals as one of the best second placed sides alongside Montpellier.
Exeter went in to the break with a 17-12 lead after a penalty try plus a touchdown from Neil Clark with Gareth Steenson converting both and adding a late penalty. Leinster replied with tries from Gordon D'Arcy - converted by Johnny Sexton - and Rob Kearney.
Leinster regained the lead early in the second half with a try from Brian O'Driscoll, converted by Sexton - who then added the extras to the bonus point try which followed quickly through Ireland skipper Jamie Heaslip.
Steenson replied with a penalty which was cancelled out by Sexton before the Chiefs had Ben White sent to the sin bin in the closing minutes, while Leinster's Mike Ross was also yellow carded soon after.
Also in Pool Five, unbeaten Clermont Auvergne booked a home draw in the quarter-finals with a bonus-point 29-0 victory as the Scarlets suffered their second competition whitewash in 17 years of European rugby at Parc y Scarlets.
Clermont captain Aurelien Rougerie registered the bonus-point try 14 minutes from time, adding to earlier scores from Napolioni Nalaga, Morgan Parra and Benson Stanley.
It was the Scarlets' seventh defeat in eight games in all competitions since the beginning of December. The Scarlets were much better side in the second half but still failed to break their duck.
Glasgow put an end to Northampton's hopes of a quarter-final berth as Peter Horne's last-gasp try secured a 27-20 Pool Four victory at a frosty Scotstoun Stadium.
In a game that marked Soane Tonga'uiha's 200th appearance for the visitors, Gregor Townsend's players achieved the Warriors' first win in this season's tournament against their head coach's former club.
The match will be remembered for the wonderful final-minute try from Horne who ran half the length of the pitch before touching down.
For Glasgow the match provided only pride to be gained as they were already unable to progress after collating a miserable two points from their first five matches.
Joshua Strauss and Niko Matawalu scored Glasgow's other two tries while Dominic Waldouck, George Pisi and Foden crossed for the visitors.
In the other Pool Four encounter, Ulster improved their chances of a home tie in the quarter finals with a scrappy 9-8 victory over Castres at Stade Pierre-Antoine.
Although not at their best, they came from behind to win, courtesy of three Ruan Pienaar penalties and now await results on Sunday to see if they will have home advantage in the last eight.
Castres had led early on thanks to a well-worked try from Piula Faasalele but it was Mark Anscombe's side who took home the points.
Montpellier ensured they would join Toulon in the quarter-finals as they cruised to a 23-3 victory over their off-colour opponents, who still finished top of Pool Six.
Tries from Thomas Combezou and Benoit Paillaugue, who converted both and also booted three penalties, gave the home side the victory they knew would assure them of a place in the last eight for the first time in their history.
Also in Pool Six, Wales Six Nations squad member Lloyd Williams was the star of the show as Cardiff Blues rewarded the dedication of their fans by beating Sale 26-14 for their first Heineken Cup victory of the season.
Droves of Blues supporters had answered a plea from the region by turning up on Friday and then again on the morning of the match to clear thick snow off the Arms Park pitch.
Their sterling efforts paid off, with the clash able to go ahead following pitch inspections at 9am and 12 noon.
Scrum-half Williams was the key man, scoring a fine individual try and setting up another for replacement lock Michael Paterson, with Wales full-back Leigh Halfpenny kicking 16 points, as touchdowns from visiting front row forwards Tommy Taylor and Aston Croall were cancelled out.
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.