Context: CREATE TABLE table_name_55 (championship VARCHAR, outcome VARCHAR, opponents_in_final VARCHAR)
Question: What is Championship, when Outcome is "runner-up", and when Opponents In Final is "Gigi Fernández Natalia Zvereva"?
Answer: SELECT championship FROM table_name_55 WHERE outcome = "runner-up" AND opponents_in_final = "gigi fernández natalia zvereva"