Cape Town — New Zealand's Glen Jackson will referee Saturday's Super Rugby encounter between the Hurricanes and Stormers in Wellington (kick-off 08:35 SA time).
Jackson will be assisted by compatriots Nick Briant and Ben O'Keeffe, with Glenn Newman the television match official (TMO).
Australia's Damon Murphy will be in charge of the Sunwolves v Lions match in Singapore (12:55 SA time).
Murphy will be assisted by Japan's Shuhei Kubo and Tawasaki Kawahara, with Minoru Fuji the TMO.
Later in the day, South Africa's AJ Jacobs will referee the Bulls' clash against the Chiefs in Pretoria (15:05).
Jacobs will be assisted by compatriots Cwengile Jadezweni and Griffin Colby, with Willie Vos on TMO duty.
Local referee Rasta Rasivhenge will take the whistle for the Sharks' clash against the Melbourne Rebels in Durban (17:15).
Rasivhenge will be assisted by compatriots Divan Uys and Aimee Barrett-Theron, with Marius Jonker in the TMO booth.
Other South African involvement sees Marius van der Westhuizen referee Friday's Blues v Highlanders match in Auckland (08:35 SA time), while Egon Seconds and Jaco Peyper will be assistant referees for Sunday's Reds v Brumbies encounter in Brisbane (07:05 SA time).