Cape Town - South African referee Jaco Peyper will be in charge of Saturday's Super Rugby encounter between the Bulls and Stormers in Pretoria (17:15 kick-off).
Peyper will be assisted by countryman Egon Seconds and New Zealand's Paul Williams, with South Africa's Marius Jonker on television match official (TMO) duty.
Earlier on Saturday, the Sharks face the Sunwolves in Singapore (12:55 SA time) where Australia's Nic Berry will be the referee.
Berry will be assisted by the South African duo of Marius van der Westhuizen and AJ Jacobs, with Japan’s Minoru Fuji the TMO.
Later on Saturday, the Lions play the Jaguares in Buenos Aires (23:40 SA time) and New Zealand's Mike Fraser will be the referee.
Fraser will be assisted by his countryman Brendon Pickerill and South Africa's Rasta Rasivhenge, with Argentina's Santiago Borsani the TMO.