There were eight teams in the quarter-finals of the 1988–89 Turkish Cup, (which was the 27th edition of the annual tournament that determined the association football Süper Lig Turkish Cup champion) and the team with the highest aggregate score was Fenerbahçe, while the team with the lowest aggregate score was Karşıyaka.
There were eight teams in the quarter-finals of the 1988–89 Turkish Cup, (which was the 27th edition of the annual tournament that determined the association football Süper Lig Turkish Cup champion) and the team with the highest aggregate score was Fenerbahçe, while the team with the lowest aggregate score was Karşıyaka.