The Stormers have upset the Bulls 23-13 in an all-South African Super Rugby derby at Loftus Versfeld stadium in Pretoria.
The Western Force also beat the Lions 27-15 in Johannesburg, new Force coach Richard Graham enjoying his first win at the expense of his predecessor John Mitchell.
The Cheetahs embarrassed the New South Wales Waratahs 23-3 in Sydney. It's the Cheetahs' first victory outside South Africa in more than five years.
