The trial is expected to be lengthy as there are over 200 witnesses on the state's list.
Downer told the court that Covid-19 travel restrictions remain a consideration as there are international witnesses as well as the Thales representative, who is in Paris, that need to be present in court.
“We don't know what will happen in the future so it is an issue that we will take as it happens.”
Zuma is accused of receiving an annual bribe of R500,000 from French arms dealer Thales for protection from an investigation into the controversial arms deal.
The alleged bribe was facilitated by Schabir Shaik, who was Zuma’s former financial adviser.