4 - Wins for India at the MCG. This is India's most successful venue away from home. Previously they had won three Tests each at Queens Park Oval, Trinidad, Sabina Park, Jamaica, and at the SSC in Colombo. No other team apart from England has won more than three matches at the MCG.
2003 - The previous instance of India winning a Test after losing the toss and bowling first in SENA countries (South Africa, England, New Zealand, Australia). That was also in Australia, the famous Adelaide Test of 2003. In fact the last time India won away from home in such a situation was in 2010 in Sri Lanka.
2 - Previous instances of teams coming back from 0-1 down to win the second Test in Australia in the last 50 years. West Indies came back from 0-1 to win at the WACA in 1975-76. After that, it was New Zealand in 2011 in Hobart. India had lost the first Test on 23 occasions in SENA countries before this and come back to win the second Test only in 2010-11 in South Africa. The last team that won back-to-back Tests at the MCG was England in 1982 and 1986 . Before that Pakistan won in 1979 and 1981.
32 - Years since no Australian batsman scored a fifty in a Test match at home. Incidentally, that was also at the MCG against West Indies. In the last thirty years, away from home, this has happened to Australia only three times.
79 - The highest score for an Australian batsmen in the last six Tests between Australia and India in Australia. Marcus Harris scored this in Sydney last year. Since the start of 2016 there have been just two batsmen who have scored Test centuries for Australia against India - Steven Smith and Glenn Maxwell.
1 - Overseas debutants in Australia with better match figures than Mohammed Siraj. Lasith Malinga is the only bowler to have taken more than Siraj's five wickets in such a scenario. Only four Indian pacers have taken more wickets on debut away from home than Siraj.
1887 - That's when a visiting team's spinners last averaged better in Australia. India's spinners figures for this series so far read 13 wickets at an average of 16.92.
2.52 - Run rate for Australia this series - the lowest ever in a home series starting from 1990. Three of the six lowest run rates for Australia in this period have come against India.
The piece erroneously mentioned Pakistan in 1979 and 1981 as the last instance. This has been corrected