The Dynamite Duumvirate Tag Team Title Tournament (DDT4) was an annual professional wrestling tag team tournament produced by Pro Wrestling Guerrilla (PWG) between 2007 and 2015.
The inaugural tournament was contested for the vacant PWG World Tag Team Championship.
The Dynamite Duumvirate Tag Team Title Tournament was originally conceived in 2007, when Cape Fear (El Generico and Quicksilver) were forced to vacate the PWG World Tag Team Championship after Quicksilver suffered a career-ending concussion during a title defense against Davey Richards and Roderick Strong.
Pac and Roderick Strong won the inaugural DDT4 by defeating The Briscoe Brothers (Jay and Mark) in the final for the vacant titles.
The reason was that the reigning champions Appetite for Destruction (Kevin Steen and Super Dragon) had been originally scheduled to compete in the tournament, but Dragon suffered an injury, forcing both of them out of the tournament.