The 1945 USA-USSR Radio Chess Match was the first international sports event since the outbreak of World War II. It was also the first international chess match played by radio. It marked the debut of the USSR in international sport. Never before had a team representing the USSR played another country in any form of sport. Mayor LaGuardia made the opening move for the U.S. Ambassador Averill Harriman officiated the match in Moscow. The first shortwave radio match in the US occurred between Ed Lasker in Chicago and Norman Whitaker in Washington, D.C. in 1920.