In the 1989–90 Greek League Cup, the participants were the 18 teams of the 1989–90 Alpha Ethniki. All rounds apart from the semi-finals, were played by a single match. If the score was level at the end of normal time, extra time was played, followed by a penalty shoot-out if the score was still level. In the semi-finals were played over two legs, with each team playing one leg at home. The team that scored more goals on aggregate over the two legs advanced to the next round. If the aggregate score was level, the away goals rule was applied, i.e. the team that scored more goals away from home over the two legs advanced. If away goals were also equal, then extra time was played. The away goals rule was again applied after extra time, i.e. if there were goals scored during extra time and the aggregate score was still level, the visiting team advanced by virtue of more away goals scored. If no goals were scored during extra time, the winners were decided by a penalty shoot-out. The event began in 31 January and ended on 2 June 1990.[6]
