F du Plessis of South Africa scored 52 and 56 not out in the just concluded test against New Zealand at Dunedin to provide the 17^th occasion of a South African captain scoring fifites in each innings  of a test including centuries  in both innings of a test. All such occasions are listed below

No	Player	FI	SI	Opposition	Ground	Start Date
1	HW Taylor	59*	56	v England	Leeds	12 Jul 1924
2	HG Deane	77	73	v England	Durban	21 Jan 1928
3	A Melville	78	103	v England	Durban	03 Mar 1939
4	A Melville	189	104*	v England	Nottingham	07 Jun 1947
5	AD Nourse	65	114	v Australia	Cape Town	31 Dec 1949
6	TL Goddard	80	84	v Australia	Sydney	10 Jan 1964
7	TL Goddard	60	112	v England	Johannesburg	22 Jan 1965
8	KC Wessels	59	74	v West Indies	Bridgetown	18 Apr 1992
9	WJ Cronje	126	67	v England	Nottingham	23 Jul 1998
10	GC Smith	277	85	v England	Birmingham	24 Jul 2003
11	GC Smith	126	50*	v West Indies	St John’s	29 Apr 2005
12	GC Smith	63	68	v New Zealand	Johannesburg	05 May 2006
13	GC Smith	94	55	v India	Cape Town	02 Jan 2007
14	GC Smith	62	75	v Australia	Melbourne	26 Dec 2008
15	GC Smith	53	115	v New Zealand	Dunedin	07 Mar 2012
16	GC Smith	52	52	v England	Leeds	02 Aug 2012
17	F du Plessis	52	56*	v New Zealand	Dunedin	08 Mar 2017

F du Plessis became the second South African captain to accomplish such a feat against New Zealand  and his feat provides the third  such occasion. All the three occasions are listed below

No	Player	FI	SI	Opposition	Ground	Start Date
1	GC Smith	63	68	v New Zealand	Johannesburg	05 May 2006
2	GC Smith	53	115	v New Zealand	Dunedin	07 Mar 2012
3	F du Plessis	52	56*	v New Zealand	Dunedin	08 Mar 2017

GC Smith {07}, A Melville {02} and TL Goddard {02} are the three South African captains to achieve the feat on two or  more occasions. The following table lists the performance of these three captains

No	Player	FI	SI	Opposition	Ground	Start Date
1	A Melville	78	103	v England	Durban	03 Mar 1939
2	A Melville	189	104*	v England	Nottingham	07 Jun 1947
1	TL Goddard	80	84	v Australia	Sydney	10 Jan 1964
2	TL Goddard	60	112	v England	Johannesburg	22 Jan 1965
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	63	68	v New Zealand	Johannesburg	05 May 2006
4	GC Smith	94	55	v India	Cape Town	02 Jan 2007
5	GC Smith	62	75	v Australia	Melbourne	26 Dec 2008
6	GC Smith	53	115	v New Zealand	Dunedin	07 Mar 2012
7	GC Smith	52	52	v England	Leeds	02 Aug 2012