South Africa are following its well tested strategy. Bat carefully for 35 overs and save wickets then try to unleash the brutal attack in the last phase of the inning, so far in this World Cup they have seen ridiculous success with this template and it looks like today they are all set to repeat the same. Spectators won't mind some fireworks.
If SA manage to put another 350 total then I am not sure if Kiwis could chased it down successfully despite their brave effort against Australia. Saying this because Proteas bowlers are performing quite well when defending big totals, almost dominating the opponent batters.
So far so good from South Africa; their strategy to hold wicket at the start is working, and they are now gradually increasing their run rate. Going over 5 runs per over at the moment, and in the last few overs, they have increased their scoring rate. From here, they will be looking to score over 350 runs. 350 will be a difficult target to chase for any team against a South African bowling attack.
Conway, Ravindra and Mitchel will be the key wickets for SA if they want to win this match with ease. The decision of choosing to field first and winning the toss is not favouring New Zealand at the moment. Let's see if their batsmen justify this decision under the lights.