Black Stars' number two goalkeeper William Amamoo believes the team’s 4-3 defeat to Japan in an international friendly was not solely his fault.The 27-year-old conceded all four goals in the second half of the game.Coach Milovan Rajevac made changes to his starting team - that qualified Ghana to the 2010 World Cup in the friendly match at the Stadion Galgenwaard in Utrecht - bringing on goalkeeper William Amamoo as substitute for Richard Kingson.But Amamoo believes he is not to blame for the Stars' defeat. He says the fall must only encourage them to work better towards future matches.Credit: Tony Beble