CREATE TABLE "ivanovic_vs_jankovic" (
  "year" real,
  "tournament" text,
  "surface" text,
  "round" text,
  "winner" text,
  "score" text,
  "length" text,
  "ivanovic" real,
  "jankovic" real
);

Question: What year did Ivanovic win with Ivanovic greater than 4 and round of R16?
SQL: SELECT SUM("year") FROM "ivanovic_vs_jankovic" WHERE "winner"='ivanovic' AND "ivanovic">4 AND "round"='r16';

Question: What is the highest result for Jankovic at Indian Wells and round of SF?
SQL: SELECT MAX("jankovic") FROM "ivanovic_vs_jankovic" WHERE "round"='sf' AND "tournament"='indian wells';