Teams from outside Dublin and Belfast competed, but played their home matches in either Dublin (if based in the Republic of Ireland) or Belfast (if based in Northern Ireland). Each round was one-legged rather than the two-legged format of previous editions.[1]
1Glentoran and Shamrock Rovers both advanced into the quarter-finals due to Belfast Celtic's withdrawal.
2Despite being given a bye into the quarter-finals, Belfast Celtic withdrew from the tournament.