Jacques Kallis picked up 4 for 15 while Richard Levi scored an unbeaten 50 as SA chased down 94 with 7.2 overs to spare.
South Africa's innings:
13th over: 91 for 0. Levi scores fifty and Amla hits the winning runs as dominant South Africa crush Zimbabwe by ten wickets. Zimbabwe are out of the tournament.
12th over: 91 for 0. Kyle Jarvis gives just three from the over. Levi one away from fifty.
11th over: 88 for 0. Another good over for South Africa. Richard Levi without much is closing in on a well deserved fifty. He is not out on 47.
10th over: 79 for 0. Cremer continues and SA batsmen are rotating the strike very well. Zimbabwe have a lot of problems and need to tighten the screws in future tournaments. On the other hand South Africa look serious contenders here.
9th over: 73 for 0. Utseya continues and Levi smashes him for four through the deep mid-wicket region and then sensibly deals in single in the rest of the over. Brilliant display of batting by the duo.
8th over: 64 for 0. Spin from both the ends. Graeme Cremer, right-arm legspinner, comes into the attack. South African duo are easing towards the total without taking any risk. Four singles from the over.
7th over: 60 for 0. Prosper Utseya, right-arm offspinner, comes into the attack and keeps it nice and tidy. Gives away just four from the over.
6th over: 56 for 0. Brian Vitori is back into the attack and South African batsmen pick another twelve from the over. Levi looks in a hurry at the moment as he hits him for two boundaries. First one he hammers it on the up past the gap at extra cover for a boundary and second one a classy punch to the deep extra-cover.
5th over: 44 for 0. SA are picking up boundaries with ease. This time Amla shows his class as he crashes Price's last ball past the gap at cover for a boundary. Another six from the over. The duo are in hurry to finish the thing off.
4th over: 38 for 0. Kyle Jarvis is back into the attack and Levi spoils what would have been a tidy over as he smashes him for four over the mid-on off the last ball. SA pick up seven from the over.
3rd over: 31 for 0. Ray Price, left-arm orthodox, comes into the attack and SA batsmen starts cautiously against the spinner. Hint of turn for him as he gives seven from the over.
2nd over: 24 for 0. Brian Vitori, left-arm fast medium, comes into the attack and its easy for South Africa at the moment. Levi joins the party as he picks up a boundary thanks to the top-edge that flies to the fine leg boundary for four. Nine of the over that also includes two singles, wide and a two.
1st over: 15 for 0. Levi and Amla are at the crease for South Africa. Jarvis opens the attack for Zimbabwe. South Africa are off to a flying start thanks to four leg-byes and two boundaries to Amla. First one a classy cover drive between the mid-off and cover region and second one an outside edge to the third man.
20th over: 93 for 8. Kallis bowls the final over and bowls another decent over. Zimbabwe finally manage to pick up another boundary as Price slaps the last ball of the innings through mid-off region. Kallis finishes with figures of 4 for 15.
19th over: 86 for 8. Morne Morkel continues and gives away six from the over. Zimbabwe still not able to get big shots and wickets falling at regular interval has also not helped the cause.
18th over: 80 for 8. Kallis picks up his fourth of the match. Ervine finally departs. Ervine opens the face of the bat and looks to guide it to third man, ends up giving a simple catch to the keeper.
Craig Ervine c de Villiers b Kallis 37(40)
17th over: 75 for 7. What a catch! AB de Villiers picks up a blinder down the leg side. Steyn bowls it short and Utseya tries to fend it away but gets some glove on it and de Villiers tales a beautiful catch. Steyn finishes with figures of 1 for 9 from his four.
Utseya c de Villiers b Steyn 5(9)
16th over: 69 for 6. Botha is back into the attack and keeps it nice and tight. He has plenty of variations in him and batsmen find him difficult to get away. Just four from it.
15th over: 65 for 6. Couple of wides and singles in Morne Morkel's last over. He finishes with the figures of 2 for 16 in his four overs.
14th over: 61 for 6. Zimbabwe are falling like pack of cards. Another one bites the dust. Kallis picks up his third of the match. Banged in short, Cremer looks to hook but gets some glove on the way to the keeper. South Africa have not given an inch to the opposition.
Cremer c de Villiers b Kallis 6(11)
13th over: 58 for 5. Dale Steyn is back into the attack yet another superb over by the pacer. Gives away just one from it. Batsmen have no clue to his pace and bouncers. Terrific stuff!
12th over: 57 for 5. Albie Morkel continues and Zimbabwe batsmen pick up another five from the over in ones and twos. Graeme Cremer has joined Craig Ervine in the middle.
11th over: 52 for 5. Jacques Kallis comes into the attack and rocks Zimbabwean middle-order with two wickets in two deliveries. First one to go Matsikenyeri, who backs away and slaps it straight to covers to Peterson. Chigumbura was next to go. He had absolutely no clue about this one. Full and straight, Chigumbura went right back and missed it completely. Absolutely plumb.
Chigumbura lbw b Kallis 0(1)
Matsikenyeri c Peterson b Kallis 11(18)
10th over: 51 for 3. Albie Morkel is back into the attack tries too much of variations. Bowls couple of wide balls and allows Zimbabwe batsmen to pick another six in singles and doubles.
9th over: 43 for 3. Botha into his second over and Ervine hits him through the cover for a boundary off the very first ball and picks another five in ones and twos from remaining deliveries. Decent two overs for Zimbabwe.
8th over: 34 for 3. Spin from both the ends. Robin Peterson comes into the attack and Ervine picks a much needed boundary of him thanks to a brilliant reverse-sweep. Eight runs from the over. The duo have now added 18 runs for the fourth wicket.
7th over: 26 for 3. Johan Botha, right-arm offspinner, comes into the attack. Zimbabwe pair takes a cautious approach to him and picks up five from the over thanks to ones and twos.
6th over: 21 for 3. Another tight over by Morne Morkel. Keeps Zimbabwe down to just four singles from the over. End of power-play. Craig Ervine and Stuart Matsikenyeri are in the middle for Zimbabwe. Ervine will be the key if Zimbabwe has to post a decent total.
5th over: 17 for 3. Another one departs. South Africa are running through Zimbabwe here. Albie Morkel picks up Masakadza, who tries another big shot and completely mistimes it and gives away simple catch to Levi at mid-on.
Masakadza c Levi b Albie Morkel 6(17)
4th over: 11 for 2. Morkel continues and another one bites the dust. Brendan Taylor goes cheaply again trying to play the cut shot, but only manages a thin edge to the keeper. Meanwhile, Masakadza hits first four of their innings.
Brendan Taylor c de Villiers b Morne Morkel 4(4)
3rd over: 4 for 1. Steyn continues and bowls another terrific over. Zimbabwe batsmen so far have been unable to take the game to bowlers and are finding difficult to find the gaps. Just one run from the over.
2nd over: 3 for 1. Morne Morkel, right-arm fast, shares the new ball for South Africa and was spot on as he send back opener Sibanda on the fourth delivery. Sibanda tries to hit him through the mid-off region but leaves plenty of space between pad and bat and is clean bowled for duck.
Sibanda b Morne Morkel 0(3)
1st over: 1 for 0. Dale Steyn opens the bowling for South Africa and keeps it nice and tight first up. Masakadza and Sibanda are the crease for Zimbabwe and watchful start by them as they don't want to lose wickets early.
South Africa: Richard Levi, Hashim Amla, Jacques Kallis, AB de Villiers, Jean-Paul Duminy, Farhaan Behardien, Albie Morkel, Johan Botha, Robin Peterson, Dale Steyn, Morne Morkel
Zimbabwe: Hamilton Masakadza, Vusi Sibanda, Brendan Taylor, Craig Ervine, Stuart Matsikenyeri, Elton Chigumbura, Graeme Cremer, Prosper Utseya, Ray Price, Kyle Jarvis, Brian Vitori
7.00 p.m. South Africa's skipper AB de Villiers has won the toss and opted to bowl first. Lots of grass on the pitch and surely seamers will love the conditions here.
6.55 p.m. We had some rain earlier in the day. 15-20 minutes of heavy showers has cooled the atmosphere. No need to worry as the match is expected to start on time.
6.45 p.m. Hello friends! We are back for the fourth match of the ICC World Twenty20, 2012. After being thrashed by hosts Sri Lanka in their opening match, Zimbabwe now take on mighty South Africa at Hambantota.
The game should not prove too much of an ask for the Proteas as it would take a very special effort from Zimbabwe to overcome this South African side. But that's where SA need to cautious as there is no room for complacency against the minnows in this format.