Question: What is the largest number Lost to David Nalbandian with a Win Rate of 20%?
SQL: SELECT MAX("Lost") FROM "2-12450517-12" WHERE "Win %" = '20%' AND "Opponent" = 'David Nalbandian';

Question: What is the smallest number of Matches with less than 97 losses and a Win rate of 28.68%?
SQL: SELECT MIN("Matches") FROM "2-12450517-12" WHERE "Win %" = '28.68%' AND "Lost" < 97.0;

Question: What is the total number of Lost for the Highest Ranking of – –?
SQL: SELECT COUNT("Lost") FROM "2-12450517-12" WHERE "Highest ranking" = '– –';