Leinster join Munster in European Cup quarters Defending champions Leinster joined rival Irish province Munster in qualifying for the quarter-finals of the European Cup after notching up a hard-fought 23-16 victory over Glasgow on Sunday. Leinster, on 20 points in Pool 3 after five victories, will now face Montpellier at home in the final round of pool matches to book themselves a home tie in the knock-out phase. Duncan Weir kicked an early penalty for the home side, later matched by Leinster counterpart John Sexton, in an opening 40 minutes that offered little in the way of try-scoring chances. Glasgow retook the lead with a second Weir penalty and then withstood wave after wave of Leinster attack, finally conceding a kickable penalty that Fergus McFadden booted for the Irish province. Leinster opened the second-half with a Rob Kearney try, the full-back latching onto a kind bounce from a Sexton cross-kick to cross the line, McFadden adding the extras. Weir claimed a third penalty to keep his team in the hunt, but McFadden stretched the lead again with his second three-pointer. Replacement scrum-half Colin Gregor then bundled over in the corner and Weir hit the tricky touchline conversion to draw the scores level at 16-16. But Leinster hit back with a crucial turnover in Warriors' territory, and Kiwi-born Ireland international scrum-half Isaac Boss spun over from close range for a try under the posts. With five minutes remaining, Leinster flanker Sean O'Brien was yellow-carded, but the Irish team rebuffed a revitalised Glasgow side to hold on for the win. In the day's late game, Saracens host Biarritz, with both teams vying to book their berth into the last eight, taken from the six pool winners and best two runners-up. Two-time European Cup champions Munster reached the quarters for the 13th time on Saturday with a battling 26-10 win over Castres. Four-time champions Toulouse clinched a four-try, bonus-point 24-3 win over Connacht which gave them a two-point at the top of Pool Six over Harlequins who defeated Gloucester 20-14. In Pool Two, Cardiff Blues beat London Irish with Welsh skipper Sam Warburton grabbing the only try of the game early in the second half.