user: Question: Who was the opponent in the championship in Johannesburg, South Africa?
Columns: ['Outcome', 'Date', 'Championship', 'Opponent in the final', 'Score in the final']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Runner-up', '23 July 1972', 'Columbus, Ohio , U.S.', 'Jimmy Connors', '5–7, 3–6, 5–7']
SQL:

assistant: SELECT "Opponent in the final" FROM "Table" WHERE "Championship" = 'Johannesburg, South Africa';