CREATE TABLE table_48621 ("Team 1" TEXT, "Agg." TEXT, "Team 2" TEXT, "1st leg" TEXT, "2nd leg" TEXT)

What is the team 2 for the match with a team 1 of Panathinaikos?
SELECT "Team 2" FROM table_48621 WHERE "Team 1" = 'panathinaikos'
SELECT "Team 2" FROM "table_48621" WHERE "Team 1" = 'panathinaikos'