Shubman Gill poses a very odd statistic. From 2020 onwards, Gill's average is the highest among any Indian Test batter when you take scores from only the second innings.
However, his career Test average is merely 35, meaning that he tends to underperform in the first innings. It proved to be the same again in the first Test between India and Bangladesh, as Gill recovered from a duck in the first innings to a fine 119 in the second.
Former India cricketer Sanjay Manjrekar expressed his bewilderment at this repeated occurrence. "I have no idea. I just cannot apply a cricketing reason to this," Manjrekar said on ESPNCricinfo, on why Gill is not able to perform well in the first innings. "His Test career went off the rails slightly.
He started very well against Australia in Australia - got a 90. After that, he had a few opportunities against not-so-great oppositions in India and didn't quite cash in, didn't get the big scores, and then had the tough tours.