533 First-innings lead for Mumbai against Uttarakhand, their highest first-innings lead in a first-class match. Their previous highest was 530 runs against Maharashtra in the 1950-51 Ranji Trophy.
1 Instances of a team not enforcing the follow-on after taking a lead of over 500 runs in Indian first-class cricket, before Mumbai against Uttarakhand. The previous instance was by Jharkhand, who decided not to enforce the follow-on recently against Nagaland, despite a 591-run lead during the pre-quarters of the ongoing edition of Ranji Trophy.
9 50-plus scores in Bengal's first innings against Jharkhand, the first ever instance of nine players scoring 50-plus runs in the same innings in first-class cricket. There has been only one previous instance of more than seven 50-plus scores in a first-class innings - eight by the touring Australians against Oxford and Cambridge Universities way back in 1893.
773 for 7 Bengal's first-innings total against Jharkhand is their highest in first-class cricket. Their previous highest was 760 against Assam in the 1951-52 Ranji Trophy.
18 Balls for Akash Deep to complete his fifty against Jharkhand. It is the joint third-fastest known fifty in the Ranji Trophy. Only Bandeep Singh (15 balls) against Tripura in 2015-16 and Pankaj Jaiswal (16 balls) against Goa in 2017-18 recorded fifties in fewer balls than Akash.
Sampath Bandarupalli is a statistician at ESPNcricinfo