The first two matches have confirmed that these New Zealand grounds are not conducive to batsmen. In both the matches, we saw at least one innings of less than 120 runs. In the first innings of the second match, we saw a big run, but it was entirely based on Devon Conway's 60. Moreover, no player has been able to make a big collection in this series so far. The 5-match T20 series is now tied at 1-1, and the third match is also going to be a low-scoring match where not many runs will be seen.
New Zealand got the upper hand early, because the way htey are defending runs right now is really great and I think to make this change from bat to bowl has been very good for them so far in the game, 4 to 5 overs has done and the batsmen are struggling to run even between the wicket at this stage only a boundary can stable the situation.
In fact, not just a single boundary, they need 2 to 3 in a row so that they can have momentum back. By the way, they already lost 2 wickets of Wiaan Mulder and Connor Esterhuizen. This is a big blow to the South African team.