Glasgow Warriors made it three wins from three and inflicted a first defeat of the season on RaboDirect PRO12 champions Leinster with a 12-6 win at Scotstoun.
Tries from Chris Fusaro and Jerry Yanuyanutawa proved the difference in front of a sell-out crowd as the hosts continued their fine start to the season.
Leinster, who beat the Warriors in last season’s semi-final, gave a debut to new signing Lote Tuqiri on the wing, the Australian dual code international having joined on a short-term deal earlier in the week.
Glasgow, who named Chris Cusiter in their starting line-up as captain, started positively, responding to Leinster’s attempts to put early territorial pressure on the home side.
But what transpired in the first ten minutes was a stop-start affair as neither side appeared able to stamp their authority on proceedings with defences on top.
Leinster were the first to truly threaten from a line-out inside the Warriors 22. The visitors went through several phases of play in a bid to get the first points on the board but buoyed by a loud home support the Warriors defence stood impressively firm, eventually winning a scrum to relieve the period of sustained pressure.
With 20 minutes played there was still no score on the board, with free-flowing rugby absent and the scrum a dominant feature of play.
Neither side were firing on all cylinders, with Leinster failing to make the most of good attacking positions but enjoying more of the ball in hand.
In the 24th minute the deadlock was broken when British and Irish Lion Ryan Grant was penalised in the scrum, the Warriors and Scotland prop giving away a penalty which was converted by Jimmy Gopperth to give Leinster a 3-0 lead.
The hosts had an immediate chance to respond though when this time Leinster were penalised in the scrum, but Stuart Hogg was off target from out wide.
Tuqiri’s debut lasted just half an hour as he was replaced by Ireland international Rob Kearney.
Hogg had a second chance to level matters but fell short with his penalty kick from 40 metres out as the game continued its stop-start nature.
The Warriors’ first chance for a try came five minutes before half-time when a swift passing move ended with a strong burst from young lock Jonny Gray but a knock-on yards from the posts ended the move.
Just before the break the Warriors, who had started to get the upper-hand, kicked to touch seven metres from the try-line and attempted a rolling maul from the line-out. And the positivity paid off when Cusiter fed flanker Fusaro to wriggle over for the game’s first try. This time Hogg found his range to give the hosts a 7-3 half-time lead.
In the second half, Leinster again started the brighter but the Warriors’ defence continued to stand firm.
Hogg’s confidence remained high despite his early penalty misses, and his attempt from fully 55 yards struck the post.
Gopperth reduced Warriors’ lead to just a point on the hour with a penalty to make it 7-6.
But it was the hosts who were looking more likely to grab the game’s second try, with Alex Dunbar and Gray combining after a great line break before a knock-on just before the try-line.
Ruaridh Jackson missed a great chance to put some more daylight between the sides with a missed penalty with just 11 minutes to play.
But the win was secured with just five minutes remaining when, again from a lineout six metres out, the hosts cleverly held up play before replacement Yanuyanutawa forced his way over for five important points from the back of the ruck. Jackson’s conversion hit the post but the victory was safe.