Fourth day's highlights:
# India's triumph by an innings and 135 runs is their second biggest win over Australia in Tests - the biggest being by an innings and 219 runs at Eden Gardens, Kolkata in March 1998.
# The aforesaid win is India's sixth biggest in Tests - the biggest being by an innings and 239 runs against Bangladesh at Dhaka in 2007.
# Overall, India have won four Tests against Australia by an innings - one each at Kolkata, Hyderabad, Mumbai and Sydney.
# India have won 22, lost 38 and drawn 23 (Tied 1) out of 84 played against Australia - winning % 26.19.
# For the first time in Test cricket, a team has lost by an innings after declaring voluntarily in the first innings.
# In the 1981 Leeds Test against England, Australia had declared their first innings at 401 for nine innings and lost by 18 runs.
# Mahendra Singh Dhoni, as captain, has won all six Tests against Australia in India.Â Australia have lost six successive overseas Tests to a captain for the first time.
# Dhoni is the only Indian captain to have recorded six wins against Australia in Tests.
# Dhoni, with 22 Test wins out of 45 (winning % 48.88), has set an Indian record for most victories as captain, bettering Sourav Ganguly's tally of 21 victories in 49 (winning % 42.85).
# India have taken an unassailable 2-0 lead in the series.
# Australia's 131 is their joint seventh lowest total against India in Tests - their lowest being 83 at Melbourne in February 1981.
# After failing to take a wicket in his last four innings - second innings against England at Nagpur, both the innings against Australia at Chepauk and the first innings at Hyderabad, Ishant Sharma has claimed his first wicket in the present series.
# Shane Watson has averaged 19.25 in the present series - 77 runs in four innings.Â In his last twelve Test innings, his only fifty is 83 against Sri Lanka at Melbourne in December 2012.
# Watson, as a batsman, has produced mediocre performance since January 2011, aggregating 688 in 26 innings (14 Tests), including four fifties.Â During the said period, his overseas average is just 23.78 - 452 runs in 19 innings (ten Tests).
# Michael Clarke is averaging 59.29 in first team innings and 42.63 in second team innings.
# Despite his failure in the second innings, Clarke is averaging 69.18 as captain - his run-aggregate being 2560 in 40 innings (23 Tests).
# For the first time an Indian bowler has clean bowled Michael Clarke in both the innings of a Test match - the bowler being Ravindra Jadeja.Â The only previous instance when a bowler had clean bowled Clarke was Dale Steyn - Cape Town in March 2009.
# Ed Cowan (44) has recorded his highest score in seven innings - his last Test fifty being 56 against Sri Lanka at Hobart in December 2012.
# Ravindra Jadeja's match figures of six for 66 are his career-best in a Test match.
# Ravichandran Ashwin's tally of 81 wickets (ave.28.93) is the most by an Indian bowler after 14 Tests.Â Only two bowlers have bagged more wickets after 14 Tests than Ashwin - T.Richardson (England) - 88 and C.T.B. Turner (Australia) - 83.
# Ashwin's third five-wicket haul (5/63) against Australia is his eighth in Tests.
# In five Tests against Australia, Ashwin has claimed 27 wickets at an average of 32.11.
# Ashwin has completed 50 wickets in a winning cause - 53 (ave.19.67) in seven Tests.Â His tally includes seven instances of five wickets in an innings and two instances of ten wickets in a match.
# The two leading wicket-takers in the first two Tests in the present series are Ashwin (18 at 16.77) and Jadeja (11 at 19.00).
# Cheteshwar Pujara has received his second Man of the Match award - his first against Australia.Â Both his double century knocks have earned him the Man of the Match awards.