Virat Kohli has hit six double centuries in 32 Tests. That's the best ratio in cricket history. Kohli just put Don Bradman into the second spot! That's not the only record he holds:
Kohli set a new record for most double-centuries by captains in Tests - six - going past Brian Lara who had five. Considering the period between 1932 to 2015, no Indian captain had hit more than one double-century. MAK Pataudi, Sunil Gavaskar, Sachin Tendulkar and MS Dhoni had hit one each in their time leading the side.
Kohli was very good when he started playing for India but he has turned into an absolute beast in the last two years.