CREATE TABLE table_26368963_1 (under_13 VARCHAR, under_17 VARCHAR)

When the under-17 was Antonio Glez, who was the under-13?
SELECT under_13 FROM table_26368963_1 WHERE under_17 = "Antonio Glez"
SELECT "under_13" FROM "table_26368963_1" WHERE "Antonio Glez" = "under_17"