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Munster vs. Saracens
It could be argued that the legend of the modern Munster was born in two games against Saracens way back in 2000. The two sides shared 130 points over the games, with Munster prevailing by a single point on each occasion, scoring at the death in both matches.
Saracens will return to Limerick looking to land the punch that could sound the death knell for a once great Munster side, one that has been faltering in recent years.
If any side is built to conquer fortress Thomand Park, it is Sarries. They have a pack that will not be intimidated and a kicker that will punish any indiscretions. They won't be fazed by the atmosphere and will try to impose their game on Munster.
Their English contingent will have been buoyed by last weekend's defeat of New Zealand, and that should boost the whole squad.
Munster, on the other hand, are in the process of rebuilding under new coach Rob Penney. The signs have been positive but they have a long way to go, and will enter the game with a growing injury list.
They aren't the Munster of old, but won't go down without a fight.
Prediction: Munster by less than seven points with no try bonus point.
Racing Metro vs. Edinburgh
All the focus has been on the Munster/Saracens game, but this game will be no less important to the group's final makeup.
The French are notoriously ambivalent when it comes to the Heineken Cup. As soon as their chances seem over, they tend to turn their attention elsewhere.
Racing Metro will come into this game chasing a bonus-point victory, anything less could lead to them focusing on the Top 14.
Edinburgh promised much, but have failed to build on last season's heroics. They have flattered to deceive in the Pro 12, and have failed to score a single point in their two Heineken Cup games so far.
Prediction: Racing Metro by more than seven with try bonus point.