Allrounder Ashwin, and India's No. 3 trouble
3 India players who made two or more 50-plus scores and took two or more five-wicket hauls in a Test series. R Ashwin, in this series, joins Kapil Dev and Bhuvneshwar Kumar in doing the bat-and-ball double. Kapil did it twice, against Pakistan in 1979-80 and England in 1981-82 and Bhuvneshwar achieved it in England in 2014. However, Kapil and Bhuvneshwar did it in a series of five or more matches whereas Ashwin's has come in a four-match series.
66.57 Ashwin's batting average against West Indies - the best by any India batsman with five or more innings. He has converted each of his three fifties into centuries before this unbeaten 75 on the first day in St Lucia.
3 Partnerships of 50 or more runs for the sixth wicket for India in this series in as many innings. This is the joint-most for India in an away series. Ashwin and Saha added 71 runs in the first Test, and Rahane and Saha added 98 runs in the second Test before the unbeaten century stand between Ashwin and Saha in St Lucia.
5.11 Run rate off the second new ball - 46 runs in nine overs. From the start of the second session until the new ball was taken after 81 overs, India had made just 101 runs in 58 overs, a run rate of 1.74. They had a good run rate in the first session though, scoring 87 runs in 23 overs at 3.78 per over.
290 Average score on the first day in the four Tests in St Lucia before this match. India's 234 is the lowest total on the first day at this venue. In 2006, India had made 361 in 85 overs on the first day at this venue.
2 Occasions for India when three of their top five batsmen were out for single-digit scores against West Indies since 2000. Before this match, the only instance in this century was in Bridgetown in 2011.
25.28 Average of India's No. 3 batsmen in Tests since the start of 2014 - lowest among all teams. In 38 innings in this period, there has been just one century and four fifties by India's No. 3. Excluding West Indies, Bangladesh and Zimbabwe, all other teams have averaged more than 40 in this period from the No. 3 position. Two years prior to that, between 2012 and 2014, India's No. 3 had averaged 57.15, third-best among all teams.
23.25 Virat Kohli's average at No. 3 in Tests. In five innings at that position he has made just 93 runs with a high score of 41. The last time before this Test that he batted at No. 3 was in March 2013. He averages 50.64 at No. 4, 42.95 at No. 5 and 44.88 at No. 6.
26.31 Ajinkya Rahane's strike rate in this innings - 35 runs off 133 balls - his lowest in any innings lasting 25 or more deliveries. He had scored 16 runs off his first 33 balls, a strike rate of 48.48, but added just 19 runs off the next 100 deliveries.
2 Teenagers who have opened the bowling for West Indies in Tests. Debutant Alzarri Joseph, at the age of 19 years and 263 days, is the second such bowler for West Indies. The first was Jerome Taylor, aged 19 years and 5 days in 2003. The last bowler younger than Joseph to open the bowling on his debut was Pat Cummins in November 2011.
Bharath Seervi is stats sub-editor at ESPNcricinfo. @SeerviBharath