D Elgar scored 140 and 89 in the ongoing test against New Zealand at Dunedin to provide the 20^th occasion of a South African opening batsman scoring a century and fifty in a test  including centuries in each innings of a test. All such occasions are listed below

No	Player	FI	SI	Opposition	Ground	Start Date
1	PGV van der Bijl	125	97	v England	Durban	03 Mar 1939
2	A Melville	189	104*	v England	Nottingham	07 Jun 1947
3	B Mitchell	120	189*	v England	The Oval	16 Aug 1947
4	EAB Rowan	236	60*	v England	Leeds	26 Jul 1951
5	EJ Barlow	109	54	v Australia	Melbourne	01 Jan 1964
6	EJ Barlow	138	78	v England	Cape Town	01 Jan 1965
7	TL Goddard	60	112	v England	Johannesburg	22 Jan 1965
8	BA Richards	81	126	v Australia	Port Elizabeth	05 Mar 1970
9	G Kirsten	102	133	v India	Kolkata	27 Nov 1996
10	G Kirsten	77	108*	v Australia	Adelaide	30 Jan 1998
11	HH Gibbs	51	104	v Australia	Durban	15 Mar 2002
12	GC Smith	277	85	v England	Birmingham	24 Jul 2003
13	HH Gibbs	161	98	v England	Johannesburg	13 Jan 2005
14	AB de Villiers	92	109	v England	Centurion	21 Jan 2005
15	GC Smith	126	50*	v West Indies	St John’s	29 Apr 2005
16	ND McKenzie	94	155*	v India	Chennai	26 Mar 2008
17	GC Smith	53	115	v New Zealand	Dunedin	07 Mar 2012
18	SC Cook	59	117	v Sri Lanka	Port Elizabeth	26 Dec 2016
19	D Elgar	129	55	v Sri Lanka	Cape Town	02 Jan 2017
20	D Elgar	140	89	v New Zealand	Dunedin	08 Mar 2017

D Elgar became the second South African opening batsman to accomplish such a feat against New Zealand after GC Smith. GC Smith had made 53 and 115 at the same venue Dunedin iin Mar 2012. Both the occasions are furnished below

No	Player	FI	SI	Opposition	Ground	Start Date
1	GC Smith	53	115	v New Zealand	Dunedin	07 Mar 2012
2	D Elgar	140	89	v New Zealand	Dunedin	08 Mar 2017

GC Smith {03], D Elgar {02}. EJ Barlow {02},G Kirsten {02} and HH Gibbs {02] are the five South African batsmen who have accomplished the feat on two  or  more occasions. The  performance of these  five batsmen are furnished below

No	Player	FI	SI	Opposition	Ground	Start Date
1	GC Smith	277	85	v England	Birmingham	24 Jul 2003
2	GC Smith	126	50*	v West Indies	St John’s	29 Apr 2005
3	GC Smith	53	115	v New Zealand	Dunedin	07 Mar 2012
1	D Elgar	129	55	v Sri Lanka	Cape Town	02 Jan 2017
2	D Elgar	140	89	v New Zealand	Dunedin	08 Mar 2017
1	EJ Barlow	109	54	v Australia	Melbourne	01 Jan 1964
2	EJ Barlow	138	78	v England	Cape Town	01 Jan 1965
1	G Kirsten	102	133	v India	Kolkata	27 Nov 1996
2	G Kirsten	77	108*	v Australia	Adelaide	30 Jan 1998
1	HH Gibbs	51	104	v Australia	Durban	15 Mar 2002
2	HH Gibbs	161	98	v England	Johannesburg	13 Jan 2005