The Proteas had lost all seven of their previous World Cup semi-finals across the T20 and 50-over events but are now one victory away from a maiden trophy after an eighth win out of eight at this year's competition.

Aiden Markram's side - who will now face England or India in Barbados on Saturday - rolled Afghanistan in 11.5 overs on a surface offering extreme bounce and ample seam movement with Azmatullah Omarzai (10) the only batter to make double figures as the first-time semi-finalists were demolished for their lowest T20I score.

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Pacemen Marco Jansen (3-16), Anrich Nortje (2-7) and Kagiso Rabada (2-14) razed the Afghanistan top order - Rashid Khan's side were 28-6 in 6.3 overs after electing to bat - before spinner Tabraiz Shamsi (3-6) polished off the tail.

South Africa reached their target in 8.5 overs as Reeza Hendricks (29no off 25) followed a hooked six off Azmatullah with the match-clinching four down the ground, taking his stand with Markram (23no off 21) to an unbroken 55 off 43 deliveries.

Quinton de Kock (5), bowled by Afghanistan quick Fazalhaq Farooqi's in-swinger in the second over after being struck on the body by Naveen-ul-Haq in the first, was the only Proteas player to be dismissed in the chase.

But Markram and Hendricks still had to deal with deliveries flying through dangerously high as well as scuttling through low before securing South Africa's landmark victory.

Afghanistan blown away on unruly pitch

Markram's men will now become the first side to win the T20 World Cup having come through the tournament unbeaten if they see off England or India in Bridgetown this weekend, with the second semi-final in Guyana from 3.30pm on Thursday.

Afghanistan - who finished ahead of Australia in Super 8s Group 1 to reach the semi-finals - were simply blown away by South Africa on the sketchy surface, losing Rahmanullah Gurbaz (0) to the sixth ball of the match as the opener edged Jansen behind.

Jansen bowled Gulbadin Naib (9) with a nip-backer in the third over, while Rabada then castled Ibrahim Zadran (2) and Mohammad Nabi (0) in the fourth before Jansen struck again in the fifth when Nangeyalia Kharote (2) gloved a short ball down the leg-side.

Top-scorer Azmatullah holed out at deep cover off Nortje in the seventh but South Africa had to wait another three overs for their next breakthrough as Rashid (8) and Karim Janat (8) added 22 from 18 deliveries in partnership.

However, Shamsi took two wickets in three balls in the 10th, removing Janat and Noor Ahmad (0) lbw, before Nortje knocked Rashid's off stump out of the ground in the 11th and Naveen (2) was then lbw to Shamsi on the sweep from the fifth ball of the 12th.

South Africa's men will now hope to go one better than their women's team, who were beaten in the final of the 2023 T20 World Cup by Australia, while Afghanistan's disappointment at being knocked out should be soothed by how much they impressed in this tournament, with wins over New Zealand and Australia the highlights.

'Conditions didn't let Afghanistan do better'

Afghanistan captain Rashid Khan:

"It was a tough match for us as a team. We might have done a bit better than that, but the conditions didn't let us. That's what T20 is about, you've got to be ready for any situation. They bowled exceptionally well, we couldn't bat well.

"To reach the semi-final and play one of the best teams in South Africa, we'd have taken that. It's just the start for us, we can beat any team if we can keep it simple."

'World Cup final nothing to be scared of'

South Africa skipper Aiden Markram:

"It feels good. It's not really the captain that gets you to this stage of the competition, it's a massive squad effort and people behind the scenes. I'm chuffed we have one more crack at winning a trophy.

"We've never been there before but it's nothing to be scared of. It's an opportunity that we've never had.

"We feel we've been playing really good cricket for a couple of years now and have some world-class players in the group.

"Obviously there are external pressures but we're trying to keep it simple and that should give us a good chance."

Watch the second T20 World Cup semi-final between England and India, in Guyana, live from 3pm on Sky Sports Cricket (first ball at 3.30pm). Then catch the final in Barbados from 3pm on Saturday (3.30pm first ball).