In a major blow to New Zealand, pace spearhead Trent Boult has been ruled out of the second Test of the three-match series against South Africa beginning at the Basin Reserve, Wellington on Thursday.
Off-spinner Piedt‚ who played the most recent of his seven tests against New Zealand in Centurion in August‚ will join the squad at the weekend‚ visa permitting. Jeetan Patel is retained as the specialist spinner while de Grandhomme's batting has edged out Matt Henry.
Taylor's replacement, Neil Broom, is to make his test debut at the age of 33, while number five Henry Nicholls is still trying to cement his place in worldwide cricket.
Piedt could be drafted into the line-up for the third Test if the Hamilton pitch is similar to the spin-friendly surface that was used for two One-Day Internationals.
Tim Southee will return to the starting XI after missing the first test in which New Zealand elected to play two spinners.
"I said before the series that if we can get rid of Williamson and Taylor there's a lot of pressure on the rest of the batting lineup", du Plessis told reporters.
The test begins tomorrow.
"We couldn't get rid of Kane in the first test and they were successful as a unit".
New Zealand's situation is not helped by the loss of batsman Ross Taylor and injury concerns surrounding fast bowler Trent Boult who has until Wednesday evening to prove his fitness.
But with the Basin Reserve having it's traditional green cover, du Plessis said his seamers were looking forward to the second Test. Five years ago here Vernon Philander and Morne Morkel both took six-wicket hauls.