New batsman JP Duminy picks up a two and a single before du Plessis hits down the ground for a single to bring up South Africa's 50 at the end of the seventh over. They're currently well on course to at least reach the 122 runs needed to eliminate India, but a couple more wickets would change that.
Wicket for Yuvraj with his first ball. It's a slow, gentle left-arm spinner that de Villiers somehow manages to chop into his own stumps.
Faf du Plessis, Pakistan hero. Couldn't buy a run in England a month or so ago, but du Plessis is knocking India out of the World Twenty20 here as he laces two more boundaries over the offside field and adds three more twos to collect 14 runs from the over. Pathan kept offering width, and du Plessis kept gratefully smashing it.
Big over for South Africa off Khan as du Plessis picks up a pair of twos on the offside before slotting a length ball over the ropes at long-of for the first six of the innings.
Faf du Plessis is the new batsman. He's off the mark with a single before de Villiers capitalises on some width from Pathan and slaps a four through cover off the back foot.
Pakistan fans looking concerned in the Premadasa as Kallis chips a Pathan inswinger to midwicket where Sharma takes a straightforward catch.
De Villiers flays Khan over extra-cover for four and hits through midwicket for two more, but the other four balls in the over are dot balls and India still have control of this powerplay.
Irfan Pathan shares the new ball and gets plenty of swing back into the right-handers. This produces a big lbw shout against Kallis - going over the top - and a clip through midwicket for four.
AB de Villiers in at three, and he's off the mark with a clip through square-leg for two after surviving a big lbw shout to a ball pitching just outside leg.
What a start for India as Hashim Amla falls to the second ball of the innings. Zaheer Khan pushed it across the right-hander and found the outside edge, with Sehwag taking a smart low catch at slip.
South Africa need 153 runs to win at 7.65 runs per over. More importantly, the magic number for India and Pakistan is 121. That's what India must restrict the Proteas to in order to get ahead of Pakistan on NRR and take the final spot in the semi-finals.
After three singles from Kallis' over, Dhoni gets a sweep away to the square-leg boundary to bring up India's 150. He tries the helicopter shot next but can only send it scudding along the ground to long-on for a single. WICKET! Raina run out 45: Raina hits the last ball of the over down the ground and tries to run two but is short of his ground despite de Villiers needing two attempts to dislodge the bails.
Big over this for Dhoni and India. Could yet prove crucial. The India skipper clubs Steyn over midwicket for four and then scampers two for a thick outside edge to third-man. The next ball is a short ball from Steyn, and Dhoni baseballs it straight back past the bowler and a frantically ducking umpire for four more. Another slog towards cow corner brings Dhoni two runs as Duminy fumbles on a slightly tatty part of the outfield before a pull shot brings a couple more to make it 14 from the over for Dhoni and India. Steyn's figures take a bit of a hit, but he's still gone for only 26 in his four overs.
India looked poised for a late flurry a few overs ago, but South Africa have put the squeeze on to good effect in the last few overs. That building pressure should've produced the wicket of Raina for Kallis, but Farhaan Behardien puts down a simple catch at deep midwicket. Raina gets two for that, and thrashes the next ball to the fence at midwicket.
Steyn back to bowl, presumably, overs 17 and 19. Mid-off is inside the circle so Raina goes over him for four, but that's the only big hit India can get away in the over.
MS Dhoni strides out to join Raina in the middle. India need a massive last four overs here. South Africa, meanwhile, have used seven bowlers and Albie Morkel is not among them. Must've been recalled as a specialist batsman.
Brilliant from Peterson. With the first five balls of his final over yielding just three singles, a big shot had to come. Sharma goes for the slog-sweep, misses and is hit on the back leg in front of everything. Simple leg-before decision.
Good first over from JP Duminy, restricting Raina and Sharma to six singles.
Lovely shot from Sharma, using the pace from Botha to glide the ball down to the third-man boundary. Raina then brings up the 100 with yet another in-to-out drive over extra-cover. The footwork is immaculate and allows him to hit a big gap in the field. Botha ends the over with a full-toss that Raina hits down the ground for a couple, du Plessis doing superbly well to flick the ball back before his knee hits the ropes. Good over, though. Run-rate going the right way for India, and the wrong way for Pakistan.
Raina looking to press the accelerator here, driving inside-out over cover again but getting only two thanks to good work on the rope by Steyn before whipping the next ball behind square-leg for four.
Morkel gets away with a free hit after a no-ball, sending a bumper past Raina's grille and flailing bat, before Botha almost takes a sensational catch running back from mid-on. Sharma goes for the big shot but gets more height than distance. Botha runs back, dives and grabs hold of the ball but agonisingly it pops out as he lands. Raina clubs the next ball back past the bowler, and almost takes Morkel out. An eventful over ends with Raina giving himself room and driving over cover and just short of the rope for four runs. Morne Morkel's work is done; he ends with 2/28 from his four overs.
Faf du Plessis is an average bowler but an excellent fielder. The second part is crucial here as he makes two fantastic run-saving stops off his own bowling to sneak one through at a cost of just three runs.
Sharma hit a lovely boundary earlier in the over, lifting Morkel over mid-off for a one-bounce four. But India look to be heading home.
Morne Morkel returns and strikes with the final ball of his third over, sneaking a slower ball between bat and pad and into the off stump. Yuvraj completely deceived there.
Yuvraj just about keeping India's hopes alive here as he whips Botha through midwicket for four. Hit that outrageously well - Kallis only had a few yards to cover on the midwicket fence but couldn't make it.
Another superb six from Yuvraj, this time getting down on one knee to sweep Peterson high over the ropes at midwicket. India need plenty more of that.
A gorgeous, effortless swing of the bat brings Yuvraj Singh six over wide long-off, but Johan Botha responds in style, fizzing a big-spinning delivery past the outside edge.
Two batsmen on nought now for India, whose semi-final hopes may have gone already after a terrible powerplay. They're effectively 4/3 here.
Sehwag smokes Robin Peterson for a huge six over long-on but is then drawn down the track trying to repeat the shot, gets nowhere near the pitch and has an ugly, desperate hack that misses the ball which in turn hits the off stump.
Rohit Sharma the new batsman. There are plenty of Pakistan fans in the crowd waving South African flags, and so far the Proteas are doing their fellow boys in green proud.
Jacques Kallis claims the big wicket as Kohli fails to get out of the way of a short ball at his ribs and gloves the ball down the legside for a diving de Villiers to snaffle. India in early trouble, Pakistan looking good for the last four.
In-form Virat Kohli off the mark in confident style with a push through the covers for two runs, but this is not the start India needed.
The pressure was building after that Steyn over, and it tells here as Gambhir looks to manufacture something by backing away but succeeds only in having his middle stump knocked back.
Superb over from Steyn, only leg-byes from it. The last ball is a bumper that's too quick for Gambhir's attempted pull shot and flies away to the fine-leg boundary via the batsman's body.
Gamhir takes a stop-start but eventually safe single from Morne Morkel's first ball before Sehwag saunters a couple of legside twos as the bowler fails to adjust his line to the right-hander. Sehwag adds a single before Gambhir picks up two with an astonishing shot, backing away and clothing the ball back over Morkel's head but out of mid-on's reach.
Great start for India as Gautam Gambhir slaps Dale Steyn's first delivery to the cover fence before Hashim Amla fails to prevent a legside delivery finding the rope via Gambhir's pads. Steyn swinging the ball into the left-hander, but again gets his line wrong and is knocked away for an easy single on the legside. That inswing to the southpaw becomes outswing to the right-handed Virender Sehwag who is beaten outside off to conclude the over.
The players are out in the middle for the national anthems.
G Gambhir, V Sehwag, V Kohli, Yuvraj Singh, RG Sharma, MS Dhoni (capt, wk), SK Raina, IK Pathan, R Ashwin, L Balaji, Z Khan.
HM Amla, JH Kallis, AB de Villiers (capt, wk), JP Duminy, F du Plessis, F Behardien, JA Morkel, J Botha, RJ Peterson, DW Steyn, M Morkel.
Two changes for South Africa: Faf du Plessis replaces Richard Levi, Albie Morkel comes in for Wayne Parnell. India unchanged.
South Africa win the toss and choose to bowl first. So India's task gets a bit trickier; slightly easier to control these target-within-a-target situations when batting second I reckon. De Villiers may have won the toss, but looks far from happy. His side, he admits, are playing "for pride". The worst thing a team can be playing for, as it means there is nothing else.
It looks like India will need to win by 31 runs if they bat first, or with four overs to spare if they are chasing.
Pakistan beat Australia by 32 runs; reckon India will need a similar margin over South Africa to reach the semi-finals, but we're still waiting for an official number.
It's the final match of the Super Eight stage here in Colombo, with Pakistan's win over Australia earlier meaning South Africa are now out of the running. Australia got close enough (just) to their target to ensure their spot in the last four, but India can still deny Pakistan, but only with a big victory over the Proteas. This is less cricket than it is a maths exam. We'll let you know just how big India's victory needs to be once the boffins have finished fiddling with the abacus.