**The Guinness PRO14 will take centre stage this weekend with four mouthwatering fixtures setting the agenda from Galway to Parma.**\n\nThe action kicks off on Friday night with an intriguing Welsh derby between the Scarlets and Cardiff Blues in Llanelli, where a dozen of Wayne Pivac's Wales Guinness Six Nations squad will be in action, with a number of key head to head battles highlighted by the scrum-half duel between international number nines Gareth Davies and Tomos Williams.\n\nEdinburgh, pipped by a point against Glasgow last time out, face a testing mission on Saturday when they head to northern Italy for an appointment with in-form Zebre. Michael Bradley's men are chasing a fourth successive victory in all competitions for a first time since the 2015-16 season.\n\nA juggernaut battle, meanwhile, lies ahead in Limerick on Saturday night as Munster and Leinster clash at Thomond Park. Leinster hold second place in Conference A, five points behind Ulster with two games in hand, and Munster possess an 11-point advantage as Conference B top dogs.\n\nSunday's PRO14 action is at the Sportsground in Galway, where Connacht will welcome the Ospreys. The Irish side toppled Leinster and went close against Munster in recent weeks, and they know another stern test awaits, with Ospreys having won three of their last four league games under head coach Toby Booth.