Springbok coach Jake White was delighted by the improvement shown by his team in the 25-14 win over England.
White is pleased to have widened his pool of players for the World Cup
He left many senior players at home for the tour of Europe and they began with a record defeat by Ireland before losing the first Test against England.
"The most encouraging thing for me is how this team has developed over the last three weeks," he said.
"This is a massive win, and we now have 40-45 players we can pick for next year's World Cup."
South Africa had lost seven matches in a row against England and White was relieved to have halted the appalling run of results.
"The fact we haven't won at Twickenham since 1997 is a huge psychological boost for us," he said.
"We play England in South Africa this summer and we will be confident for those matches."
White has to fly home to a meeting with his bosses following the Boks' poor run and he admitted he could relate to opposite number Andy Robinson, who will face renewed calls for his sacking after the defeat.
"There is always pressure on the national coaches. I've been there so I can empathise with Andy," said White.
"It's a difficult situation to be in and I feel for the guy. It's tough times for everybody. I have been down that road and it's a lonely place to be."