Since every ICC tournament in India has been held in months of February to April, I will take the ODI team rankings according to January 27, 2021 as reference for deciding the groups. The 8 teams participating are England, India, New Zealand, Australia, South Africa, Pakistan, Bangladesh and Sri Lanka.
All odd-ranked teams will be in Group A and even-ranked teams be in Group B.
The three venues decided for the tournament are Eden Gardens (Kolkata), M. Chinnaswamy Stadium (Bengaluru) and Arun Jaitley Stadium (New Delhi).