High Quality Content by WIKIPEDIA articles! Ubaldo Aquino Valenzano (born May 2, 1958) is a football (soccer) referee from Paraguay, best known for supervising two matches (Germany-Saudi Arabia and Sweden-Senegal) during the 2002 FIFA World Cup in Korea and Japan. A referee presides over a game of association football. The referee has "full authority to enforce the Laws of the Game in connection with the match to which he has been appointed" (Law 5), and the referee's decisions regarding facts connected with play are final, so far as the result of the game is concerned.