In that case, it's unlikely to worry New Zealand. They opted for a fourth seamer, Doug Bracewell, at the expense of a second specialist spinner, Ish Sodhi, in the Durban test. Bracewell was tidy in a good New Zealand seam bowling display. Retaining the status quo seems probable, given du Preez's expectations.
New Zealand's bowling coach Shane Jurgensen marked the bowlers' report card with a pass mark.
"We bowled quite well but can do better," he said. "We know we can bowl a bit better, it's exciting for us."
Jurgensen said plenty of thought would go into handling star batsman Hashim Amla, who averages a fine 51.46 in 93 tests. That jumps to 78.5 in 10 against New Zealand.
"Obviously Amla is a very good player and we probably have to slightly adjust our plans to him.
"'It's little things, make sure we limit the boundaries, but that's the way Amla plays. We've got to go through the process of limiting that damage early."
Amla was severe on three of the seamers, Tim Southee, Neil Wagner and Doug Bracewell, at times in Durban as he made 53 before left armer Trent Boult, the pick of the attack, removed him.
Bracewell said there had been positives for the New Zealand bowlers.
"I was reasonably happy with the way I went. It was good to get 16 overs under the belt. A little bit of learning came out of that, both for us and about South Africa. We know what we're up against."