How to design tables for players in a tournament?

Question

I need help with my database table design.

I have group which contains a list of players. In every group each player plays games with other players. Game has also some result for example 1:0 and there can be overtime too.

I already created some tables but I dont think this is a good solution. There is problem when I create java classes from these tables.

PlayerResult has lists of games. Game has opponent which is again PlayerResult which have listOfGame again etc... I dont know how to solve this cycle because every playerResult should know all their game to count score and point. Please help me improve the table design.

CREATE TABLE IF NOT EXISTS `GROUP` (
  `ID` int(11) NOT NULL AUTO_INCREMENT,
  `NAME` varchar(255) NOT NULL,
  PRIMARY KEY (`ID`),
  UNIQUE KEY `NAME` (`NAME`,`GROUP_ID`),
  KEY `TOURNAMENT_ID` (`TOURNAMENT_ID`)
) ENGINE=InnoDB  DEFAULT CHARSET=latin1; 


CREATE TABLE IF NOT EXISTS `PLAYER_RESULT` (
  `ID` int(11) NOT NULL AUTO_INCREMENT,
  `POINTS` int(11) DEFAULT NULL,
  `RANK` int(11) DEFAULT NULL,
  `GROUP_ID` int(11) NOT NULL,
  `PLAYER_ID` int(11) NOT NULL,
  `SCORE` varchar(10) NOT NULL,
  PRIMARY KEY (`ID`),
  KEY `PLAYER_ID` (`PLAYER_ID`),
  KEY `GROUP_ID` (`GROUP_ID`)
) ENGINE=InnoDB  DEFAULT CHARSET=latin1;

CREATE TABLE IF NOT EXISTS `RESULT` (
  `ID` int(11) NOT NULL AUTO_INCREMENT,
  `LEFT_SIDE` int(11) DEFAULT NULL,
  `RIGHT_SIDE` int(11) DEFAULT NULL,
  `OVERTIME` tinyint(1) DEFAULT '0',
  PRIMARY KEY (`ID`)
) ENGINE=InnoDB  DEFAULT CHARSET=latin1 ;

CREATE TABLE IF NOT EXISTS `GAME` (
  `ID` int(11) NOT NULL AUTO_INCREMENT,
  `PLAYER_RESULT_ID` int(11) NOT NULL,
  `OPPONENT_ID` int(11) NOT NULL,
  `RESULT_ID` int(11) NOT NULL,
  PRIMARY KEY (`ID`),
  KEY `VYSLEDKYHRACA_HRACA_ID` (`PLAYER_RESULT_ID`),
  KEY `RESULT_ID` (`RESULT_ID`),
  KEY `OPPONENT_ID` (`OPPONENT_ID`)
) ENGINE=InnoDB  DEFAULT CHARSET=latin1;