Cape Town - South Africa's AJ Jacobs will referee the Sharks' Super Rugby clash against the Melbourne Rebels in Ballarat on Saturday.
Kick-off is at 05:45 (SA time).
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Jacobs will be assisted by Australian duo Damon Murphy and James Quinn, with another Australian, George Ayoub, the television match official (TMO).
Later on Saturday, South Africa's Rasta Rasivhenge will handle the Stormers v Jaguares match in Cape Town (15:05).
Rasivhenge will be assisted by compatriots Egon Seconds and Griffin Colby, with Willie Vos the TMO.
In the weekend's final game, South Africa's Marius van der Westhuizen will be in charge of the Bulls v Blues match in Pretoria (17:15).
Van der Westhuizen will be assisted by countrymen Cwengile Jadezweni and Divan Uys, with Joey Klaaste-Salmans on TMO duty.
The Lions have a bye this weekend.
- Compiled by Herman Mostert