Question: What is Team 1 when Team 2 is JAC Port-Gentil?
SQL: SELECT "Team 1" FROM "2-16163508-3" WHERE "Team 2" = 'JAC Port-Gentil';

Question: What was Team 2 with a 2nd leg of 0-0?
SQL: SELECT "Team 2" FROM "2-16163508-3" WHERE "2nd leg" = '0-0';

Question: What is the 1st leg of the Round that has a 2nd leg of 1-3 and Team 1 ES Tunis?
SQL: SELECT "1st leg" FROM "2-16163508-3" WHERE "2nd leg" = '1-3' AND "Team 1" = 'ES Tunis';