SANZAAR chief executive Andy Marinos has described reports over potential alternatives to Super Rugby as "merely speculative."
The Reds came from behind to beat the Bulls 41-17 and there were Super Rugby wins for the Blues and the Crusaders.
The Hurricanes played the latter stages of their loss to the Blues with 12 men as ill-discipline cost them in a 24-15 Super Rugby defeat.
After three consecutive defeats to start the Super Rugby season, the Waratahs finally got off the mark on Friday.
The Reds squandered a promising lead in Argentina as the Jaguares claimed their second win of the season.
The Stormers held their opposition scoreless again to make it two wins from two in Super Rugby.
Runners-up last season, the Jaguares ran away with a comfortable win over the Lions.
Aphiwe Dyantyi has been formally charged with a doping violation by the South African Institute for Drug-Free Sport.
A dramatic 12-9 win over the Stormers secured the Sharks' spot in the Super Rugby play-offs, where they will be joined by the Bulls.
South Africa hooker Malcolm Marx will make a short-term move to Japan after the Rugby World Cup before returning to the Lions.