CREATE TABLE table_26614 ("Date Final" TEXT, "Tournament" TEXT, "Commercial Name" TEXT, "Category" TEXT, "Prize Money/ Surface" TEXT, "Final Match" TEXT, "Semifinal Matches" TEXT)

Who played in the semi finals matches at the Buick WCT finals?
SELECT "Semifinal Matches" FROM table_26614 WHERE "Commercial Name" = 'Buick WCT Finals'
SELECT "Semifinal Matches" FROM "table_26614" WHERE "Commercial Name" = 'Buick WCT Finals'