**The Guinness PRO14 Rainbow Cup is back with a bang this weekend, with all 16 teams in action across the two editions of the competition.** \n\nThe northern hemisphere sides played out an absorbing opening round a fortnight ago before the PRO14 Rainbow Cup SA kicked off with a pair of entertaining clashes last weekend. \n\nWith Round 2 now upon us, we take a look at five things you need to know. \n\n**Lions boost for PRO14 stars** \n\nTwenty players head into this weekend’s action boosted by the news they will be part of the British and Irish Lions squad for this summer’s tour to South Africa. \n\nLeinster and the Scarlets lead the way among the PRO14 sides with four call-ups apiece while the honour of captaining the tourists has been entrusted to Ospreys lock and Wales skipper Alun Wyn Jones. \n\nEdinburgh will provide three players to Warren Gatland’s squad, there will be two each from Munster, Glasgow Warriors and the Ospreys and Ulster, Connacht and Cardiff Blues contribute one apiece.