The World Transnational Open Teams Championship is a major side event conducted by the World Bridge Federation during the semifinal and final stages of its world championships for national teams at contract bridge—the Bermuda Bowl, Venice Cup, and Senior Bowl. New teams may enter the Transnational, as well as national teams eliminated before the semifinals of the main events—Open, Women, and Seniors respectively. It is not required that all team members be from one country, hence the term transnational. A series of Swiss matches qualifies eight teams for three knockout rounds which conclude during the finals of the main events.