Power utility Eskom said there was no load-shedding planned for Sunday, when the Springboks take on Japan in the Rugby World Cup quarter-final.

However, because the electricity system was under pressure, rotational power cuts could still happen.

Stage 1 load-shedding was in place until 11pm on Saturday,

"No load-shedding is planned for [Sunday], however the system remains constrained and volatile, and load-shedding could be implemented at short notice should there be a significant shift in plant performance and increased unplanned technical breakdown issues," the parastatal said in a statement posed on its Twitter feed on Saturday night.