Table schema:
CREATE TABLE table_name_80 (runners_up VARCHAR, year VARCHAR, champions VARCHAR, name_of_tournament VARCHAR)

Question: What were the Runners-up prior to 1990 when Ivan Lendl was Champion in the Seiko Super Tennis Tournament?
SQL: SELECT runners_up FROM table_name_80 WHERE champions = "ivan lendl" AND name_of_tournament = "seiko super tennis" AND year < 1990