CREATE TABLE table_19130829_4 (team__number2 VARCHAR, team__number1 VARCHAR)

What's the team #2 in the round where team #1 is Iraklis?
SELECT team__number2 FROM table_19130829_4 WHERE team__number1 = "Iraklis"
SELECT "team__number2" FROM "table_19130829_4" WHERE "Iraklis" = "team__number1"