GLASGOW Warriors ground out a 20-15 win over Montpellier to move second behind Leinster in Pool 3 as Rory Lamont made his first appearance since re-signing for the Scottish team.
Tempers flared in cold conditions, with three players sin-binned inside the first half -- two for Montpellier and one for Glasgow.
Despite Jon Welsh's yellow card and Montpellier touching down soon after, Glasgow got a foothold through the boot of Duncan Weir, and led 12-10 at the break.
A similarly scrappy second period ensued before a slick backline move ended in Federico Aramburu touching down in the corner with six minutes left.
The French side rallied late on to earn a losing bonus point courtesy of a Masi Matadigo try and will bid to haul themselves off the foot of Pool 3 this weekend.
Northampton head coach Jim Mallinder has admitted that his side are now playing for pride after Saturday's 41-22 Pool 1 defeat in Castres dumped them out of the tournament.
Last year's finalists also struggled with indiscipline, and had Stephen Myler and Tom Wood sin-binned.
London Irish boss Toby Booth spoke of his delight after his side's second-half 34-14 comeback at Racing Metro in Pool 2.
He said: "I couldn't have asked for more. It's shown our young side can compete with the best."
Trailing 14-3, the Exiles scored four tries to claim a bonus point.
Peter Stringer made a winning start to his Saracens career after coming off the bench in the London club's crucial 31-26 win over the Ospreys in Pool 5.
With the return fixture down for decision on Friday, that bonus could yet prove vital after Treviso caused a shock by beating Biarritz.
Leicester boss Richard Cockerill admits the Tigers will have to lick their wounds after their heaviest Heineken Cup defeat since 2003.
But the twice-European champions at least have a quickfire chance for revenge over French heavyweights Clermont Auvergne -- their 30-12 Pool Four conquerors at Stade Marcel Michelin -- when they meet again on Saturday.
"We have to go home, lick our wounds and prepare for next week's game," he said.