The winners of each group will join hosts Assam, last season's champions West Bengal and runners-up Kerala in the 12-team Final Round that will be hosted in Dhakuakhana and Dhemaji.
Delhi FC secured a commanding 3-1 victory over Shillong Lajong in round six of the I-League 2024-25 at Mahilpur on Thursday.
Winger Lalbiakdika scored a brace as Aizawl FC beat relegation rivals Delhi FC 2-0 in their I-League match on Sunday.
Delhi FC secured their first victory in 10 matches, defeating Dempo Sports Club 2-1 in the I-League.