VARIABLE BOUNCE: Inconsistent bounce has already accounted for one England-wicket, when Nick Compton was trapped in front by Kagiso Rabada on Saturday. It might become more of a factor on Sunday as South Africa pursue quick wickets when England resume on 138 for two.
ABBOTT-FACTOR: Kyle Abbott captured 7-29 in his test debut and used the slower variations outside the off-stump to cause havoc. The question is whether he can repeat that heroics at the same ground, SuperSport Park, on Sunday. He bowled two probing spells on Saturday.
BOWLING CONDITIONS: In dry conditions at SuperSport Park, Morne Morkel and Kyle Abbott might be able to extract some reverse swing or use the off-cutter to take wickets. This will be a vital morning session for SA.
MAGICAL FIFTY: Alistair Cook is 50 runs away from becoming the first England batsman to score 10 000 test runs. South Africa would hope they can use inconsistent bounce to remove the England rock early.
BOUNCE AND CONSISTENCY: Kepler Wessels and Mike Haysman have provided technical analysis of the variable bounce at SuperSport Park, but it can only be exploited if South Africa's front line bowlers operate with greater consistency than was the case on Saturday.
Bell-ringer: Gerald Dros, a former captain of the Titans, rang the bell to announce the start of the third day's play. On Monday Albie Morkel, current skipper of The Unlimited Titans, will do the bell-ringing and on Tuesday Mignon du Preez, current SA women's skipper, will do the honours.
EXCELLENT SA START: South Africa has bowled three excellent opening overs, all maidens. They have kept it on off-stump or just outside it without giving England any width. They have probed.
SHOT: Kyle Abbott produces a full wider delivery and Joe Root slams it for a four to the point boundary, a superb shot. First boundary of the morning. Abbott has been spot-on before that error.
ROOT-PROBLEM: Kyle Abbott has released the pressure with two poor deliveries in one over and Joe Root capitalized with two boundaries to lift England to 148 for two. That was mediocre.
HEART IN MOUTH: Alistair Cook has had an anxious moment or two against Kyle Abbott in his 15th over, as he popped a delivery up off the splice of his bat and it nearly presented the bowler with a catch. It is slightly two-paced at the moment and Abbott bounced back beautifully after his previous disappointing over.
CLOSE SHAVE: Joe Root edges the ball past the left hand of JP Duminy in the gully for four to brings up the 150 for England off Kagiso Rabada. It could easily have gone to hand, but Duminy, a good fielder, produced a splendid effort.
ROOT-FIFTY: Joe Root has struck 7 runs off two loose deliveries from Kagiso Rabada to complete his 50 off 92 balls with eight fours. Root is England's best batsman and among the top-three in the world. He has got so much time to play his shot and pouches on any loose deliveries better than arguably any other batsman in the world. Sixteen runs came off that Rabada-over. Short deliveries not good.
WASTED REVIEW: Morne Morkel insists on a review down the leg-side off Alistair Cook, but it missed by a mile. That was one of the poorest reviews in the whole series. Even Quinton de Kock did not go up.
MORKEL-ASSESSMENT: Morne Morkel's first over on Sunday was mediocre by his high standards. He needs to improve his line to Alistair Cook in order to bowl just outside the off-stump and nip it both ways off the seam. The big man can do it, but Cook had no problem at all as he was not tested outside the off-stump.
PIEDT-POSER: Dane Piedt has not been able to stop Joe Root from scoring. If he can improve his control a bit, he can add to the pressure on England.
SHOT: James Taylor uses his feet and drives Dane Piedt over mid-on for four to move England to 192 for three. Both batsmen are restless and want to impose themselves on the off-spinner. It is turning a bit. Interesting times.
SEVERE TEST: James Taylor has been unsettled by the pace and hostility of Morne Morkel and had a wild swing at a short, wide delivery. He is feeling the heat. Morkel has operated with greater consistency. Good stuff!
- DRS upheld
ROOT SAVED BY REVIEW: Joe Root swings at a delivery on leg side by Dane Piedt and the wicket-keeper and close fielders go up spontaneously. Root is given out and reviews. No glove or bat and the TV-umpire uphelds his review.
BEAUTY!: Kagiso Rabada produces a pearl of a delivery that leaves Joe Root and he edges it to Quinton de Kock, as he departs for 76. The length was near-perfect and the shape was superb. Rabada gets his third wicket and he is on course for another five-wicket haul. The second new ball is due in 10.5 overs.
RABADA A GEM: South Africa should not be too despondent in terms of their bowling depth. Rabada is a gem who took a hat-trick on his One Day International debut and captured 14-105 in a first-class game the previous season. He is only 20. Then Dale Steyn and Vernon Philander can still return from injuries.