By Larry Fine EAST RUTHERFORD, New Jersey (Reuters) - Lionel Messi has said that he is to retire from international soccer after Argentina were beaten 4-2 by Chile in a penalty shootout in the Copa America final on Sunday, the fourth final the Barcelona striker has lost with the national side. Messi, a five times World Player of the Year, missed Argentina's opening penalty in the shootout after the game ended 0-0 and he was shown in tears while sitting in the team dugout. "I tried so hard to be champion with Argentina. More...