**The Guinness PRO14 Rainbow Cup is finally upon us.** \n\nThough the format has changed from what was initially planned, owing to logistical hurdles caused by the coronavirus pandemic, fans will still have an opportunity to see some of the biggest names in the sport in action. \n\nWhether teams are in pursuit of glory, blooding new talent or giving their British and Irish Lions hopefuls a chance to impress, there remains plenty of intrigue around the end-of-season tournament. \n\nHere, we take a look at five things you need know ahead of Round 1. \n\n**Leinster host Munster in repeat of PRO14 final** \n\nDerbies dominate the first three rounds of the competition and the opening weekend has produced a real treat as Munster head to Leinster in search of revenge.