KL Rahul of India scored 73 not out at the end of the third day of the Kolkata test against Sri Lanka to post his ninth half century as an opening batsman in the calendar year 2017. He now shares the record for most half centuries scored by an opening batsman in any calendar year in the history of test cricket with CPS Chauhan of India. CPS Chauhan had scored nine half centuries while opening for India in the calendar year 1979. The half centuries scored by these two batsmen are listed below

KL RAHUL OF INDIA
No	Runs	Pos	Inns	Opposition	Ground	Start Date
1	64	2	2	v Australia	Pune	23 Feb 2017
2	90	1	1	v Australia	Bengaluru	04 Mar 2017
3	51	1	3	v Australia	Bengaluru	04 Mar 2017
4	67	1	2	v Australia	Ranchi	16 Mar 2017
5	60	1	2	v Australia	Dharamsala	25 Mar 2017
6	51*	1	4	v Australia	Dharamsala	25 Mar 2017
7	57	2	1	v Sri Lanka	Colombo (SSC)	03 Aug 2017
8	85	2	1	v Sri Lanka	Pallekele	12 Aug 2017
9	73*	1	3	v Sri Lanka	Kolkata	16 Nov 2017
CHETAN CHAUHAN OF INDIA
No	Runs	Pos	Inns	Opposition	Ground	Start Date
1	60	2	1	v West Indies	Delhi	24 Jan 1979
2	79	2	1	v West Indies	Kanpur	02 Feb 1979
3	56	2	3	v England	Birmingham	12 Jul 1979
4	80	2	4	v England	The Oval	30 Aug 1979
5	58	2	1	v Australia	Kanpur	02 Oct 1979
6	84	2	3	v Australia	Kanpur	02 Oct 1979
7	50	2	4	v Australia	Kolkata	26 Oct 1979
8	73	2	1	v Australia	Mumbai	03 Nov 1979
9	61	2	3	v Pakistan	Kanpur	25 Dec 1979