Leinster's victory over the Dragons last Friday temporarily moved them top while the win for the Warriors saw Gregor Towsend's men move into the top four.
Things haven't been going too well for them on home soil but away they pose a formidable task and again they are on their travels this weekend, heading to Rodney Parade to face the Dragons in one of four Sunday fixtures.
Before that however, the Scarlets host Edinburgh hoping that the momentum of their high-scoring victory over Treviso will not be lost, after last weekend's clash against Ulster at Ravenhill was washed out.
Ulster will at least be heading for warmer climes this week, travelling to Treviso on Sunday while elsewhere in Italy, Zebre host Connacht.
And, in arguably the tie of round 14 in the RaboDirect PRO12, league-leaders Munster will be put to the test when they travel to the Liberty Stadium to face an Ospreys side who put 70 points on Treviso last time out.
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