CREATE TABLE "european_record" (
  "season" text,
  "round" text,
  "opponents" text,
  "home_leg" text,
  "away_leg" text,
  "aggregate" text
);

Question: What is the home leg who are opponents of rotor volgograd
SQL: SELECT "home_leg" FROM "european_record" WHERE "opponents"='rotor volgograd';

Question: What is the round with ajax opponents
SQL: SELECT "round" FROM "european_record" WHERE "opponents"='ajax';