Kohli is the first batsman to score 4 double-centuries in 4 consecutive Test series. This is the longest such sequence going past Rahul Dravid and Don Bradman who have done it in three back-to-back series.

Virat Kohli
Kohli is the first batsman to score 4 double-centuries in 4 consecutive Test series. This is the longest such sequence going past Rahul Dravid and Don Bradman who have done it in three back-to-back series.
Virat Kohli