**The United Rugby Championship continues with a trio of fixtures this weekend, while some of the competition’s stars will be in Guinness Six Nations action.** Ulster will have no shortage of motivation to see off Connacht in the weekend’s opening fixture on Friday, before two South African derbies take centre stage on Saturday. This weekend also sees the Six Nations kick off, with Ireland hosting defending champions Wales, Scotland welcoming England and Italy travelling to France. Here are five things to know ahead of all the action.