The Springboks and Italy have played each other 14 times over the years with the Italians winning just once. That win came in 2016 when the Boks went down 20-18 in Florence.
Making his debut in the competition, Tau was a menace throughout the game as Club Brugge took a 2-0 lead in the first half before being pegged back by 11-time champions Real Madrid.
The tournament will run from 8 November, when the defending champions Jozi Stars take on Cape Town Blitz, until the grand final scheduled for 16 December 2019.
Citing experiments with testosterone, fat-burning amino acid injections and falsified medical documents, the American anti-doping authority USADA published a list of blemishes on the record of the highest-profile track and field coach in the world, Alberto Salazar.
Mark Mayambela has been without a club since being released by Port Elizabeth-based side Chippa at the end of last season, despite being the captain of the side.
The Wanderers Stadium-based outfit won the tournament last year and will be bidding to defend their title when the 2019 edition gets underway in mid-November.