They are still able to qualify for the semi-finals but will almost certainly need to win all five remaining group games after being dismantled by the Proteas at the Wankhede Stadium.

South Africa overcame a shock defeat to The Netherlands in their previous fixture with remarkable displays with and without the ball.

In the first innings, a century from Heinrich Klaasen led the charge as he top scored with 109.

Earlier on, Reeza Hendricks' 85 and a 60-run haul from Rassie van der Dussen helped the Proteas settle themselves following opener Quinton de Kock's dismissal in the first over.

Despite the return of Ben Stokes, England crumbled with the bat.

They quickly fell to 68-6 before the scorecard later showed 100-8 in what was a shocking collapse.

Some big hitting from Mark Wood and Gus Atkinson, who got five sixes, made the result slightly better but England were eventually all out for 170.

"That hundred is up there with my best ever," Klaasen said in a sweltering Mumbai that reached temperatures of 35°C.

"The conditions were brutal.

"The defeat to the Netherlands was a tough loss but one defeat does not make a bad team.

"This was a fantastic performance."

Gerald Coetzee starred out of South Africa's bowling line-up as he took three wickets for 35 runs. 

Lungi Ngidi and Marco Jansen also produced good performances with 2/26 and 2/35, respectively.

"Incredibly disappointing," said England captain Jos Buttler, who was caught out on 15 runs.

"We came here with high hopes, we wanted to play our best cricket but we were well short of that and really well beaten in the end.

"Potentially we should've batted first in this heat.

"It leaves us with no room for error.

"We probably have to win every other game we play from here on."

The competition is set to continue tomorrow as the only unbeaten teams, New Zealand and India, face off at the HPCA Stadium in Dharamshala.

Earlier in the day, Sri Lanka beat The Netherlands by five wickets at Lucknow's BRSABV Ekana Cricket Stadium.

The Dutch shocked South Africa on Tuesday (October 17) but were unable to pull off another upset as they were all out for 262.

It was a fantastic total considering they were at 91-6, mainly thanks to 70 from Sybrand Engelbrecht and 59 by Logan van Beek. 

For Sri Lanka, Sadeera Samarawickrama and Charith Asalanka steadied the ship with 91 and 44 runs, respectively, after the side was 100-3.

Samarawickrama's unbeaten total pushed Sri Lanka up to 263-5 after 48.2 overs to take their first victory of this year's World Cup.