Round 14 was one to forget for the Southern Kings and Cheetahs, while England, Ireland and Scotland each advanced their Six Nations cause.
Despite a competitive opening spell, the Kings were thrashed 59-10 by Ulster at Kingspan on Friday night.
And a yellow card to lock Rynier Bernardo pulled the carpet out from under the Cheetahs in a 25-20 loss against the Blues in Cardiff.
England continued their march to a hat-trick of successive Six Nations titles when they held on for a 12-6 win against Wales at Twickenham on Saturday.
Meanwhile, Ireland ended Round 2 at the top of the standings (on points difference) after beating Italy 56-19 in Dublin.
And Scotland climbed into fourth place on the back of a hard-fought 32-26 result against France in Edinburgh.