5. Most double-centuries in a calendar year

Michael Clarke had a dream run in 2012 in Test cricket. He averaged a whopping 106.33 in 11 matches (18 innings). He still holds the record firm. Don Bradman in 1930, Ricky Ponting in 2003, Brendon McCullum in 2014, Virat Kohli in 2016 and 2017 have three 200s each. Clarke's incredible tally of four is yet to be matched.