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The next two weekends will be key when it comes to deciding which teams advance from the Heineken Cup group stage.
Leinster, Munster, Ulster and Connacht face crucial double-headers.
Munster, in particular need a win at home to Perpignan on Sunday, to give themselves a good chance of reaching the last-8.
As it stands, Munster are second in Pool 6, one point behind the French side. With a trip to Perpignan and a visit to Gloucester still to come, Rob Penney's men have to win according to Reggie Corrigan.
"If Munster don't manage to get a win at home on Sunday against Perpignan then their chances of progressing would be hanging by a thread. A home win is vital," said Reggie.
Meanwhile, Reggie and Bernard Jackman acknowledged that Leinster are less fluid in attack as new head coach Matt O'Connor focuses on defence. But Reggie sees plenty of positives, especially when it comes to the strength in depth at the province.
"Leinster probably got off to a poor start which was inevitable because they are under a new coach and looking at new systems. I thought they would struggle more than they have. The academy players are outstanding. Jack McGrath has made a huge impact, Marty Moore is destined to be wearing a green jersey on current form, Jordi Murphy in the back row and Macken in the centre. You've got so many names that are rolling on the tongue who are very much part of the squad. That's a good indication of the strength of the academy at Leinster."
Marty Moore INPHO/Dan Sheridan
The Blues are currently top of Pool 1 after two wins from two ahead of the heavyweight clash with Northampton Saints who are currently second in the Aviva Premiership.
While Reggie believes Leinster need to get at least a bonus point in such a tight group, Bernard Jackman was not optimistic about the result on Saturday.
"Northampton v Leinster is probably the clash of this section of the Heineken Cup and Northampton are in great form. It's a big ask for Leinster to get a result over there."
Meanwhile, Ulster top their pool with two wins from two and have a straightforward match against Benetton Treviso.
But injury-ravaged Connacht, who are bottom of the Rabo Pro 12, face a tough trip to Toulouse who top Pool 3.
"They don't have great strength in depth," admitted Jackman. "Connacht have made great strides under Eric Elwood. The thing about Connact now is they spend a fair bit of money and they've brought in some quality foreign players and kept some of their players. But they have had injuries and changed the style of play and become more attacking. If you look at their key performance indicators like line breaks and offloads, it's far in excess of where they were last year. But the results are much worse so Pat Lam and his coaches will have to look for a happy medium. The thing about Connacht is they'll raise their game against Toulouse but it's the games after that in the Rabo that really matter."
Jackman also looked at Australia's improved form, building on the win over Ireland by beating Wales on Saturday.
He assessed the growing influence of No 10 Quade Cooper who has been rehabilitated under Ewan McKenzie to good effect.
Main image: Munster's Paul O'Connell and Peter O'Mahony withg referee Jerome Garces ©INPHO/Dan Sheridan
