The South African senior women's national team will be in Brazil next month to compete at the Summer Games for a second successive time.
However, Mumble has placed minimal pressure on the Dutch mentor to perform at the tournament, saying, "do the best that you can."
"We said that we don’t want to go there [Olympics] and make up the numbers. They must go there and thrive to win," said Mumble.
"So the mandate for this Olympic Games is really, 'do the best that you can,' and I hope we will get out of the group stages and go into the knockout stages at least.