CREATE TABLE table_52493 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Venue" TEXT, "Crowd" FLOAT, "Date" TEXT)

What team was the home team when the away team scored 17.21 (123)?
SELECT "Home team" FROM table_52493 WHERE "Away team score" = '17.21 (123)'
SELECT "Home team" FROM "table_52493" WHERE "Away team score" = '17.21 (123)'