CREATE TABLE table_67939 ("Country" CLOB, "Player name" CLOB, "Period" CLOB, "Position" CLOB, "Matches" CLOB, "Goals" CLOB)

Name the player name with matches of 51
SELECT "Player name" FROM table_67939 WHERE "Matches" = '51'
SELECT "Player name" FROM "table_67939" WHERE "Matches" = '51'