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. Reigning champions entered the tournament and defended the title in each round of the tournament for five editions (2008, 2009, 2010, 2013 and 2015) while three editions (2011, 2012 and 2014) of the tournament were used to determine the number one contenders to the champions.
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. As a result, the DDT4 was announced as a tag team tournament to crown the new champions. The inaugural tournament took place on at the Burbank Armory in Burbank, California. Pac and Roderick Strong won the inaugural DDT4 by defeating The Briscoe Brothers (Jay and Mark) in the final for the vacant titles.
In 2008, DDT4 became a regular annual tag team tournament for PWG, just like the prestigious Battle of Los Angeles tournament for singles competition. The World Tag Team Championship was defended in the DDT4 from 2008 to 2010.
In 2011, a shift from the previous tradition took place as the reigning champions áPeligro Abejas! (El Generico and Paul London) were not entered into the tournament and the tournament was used to determine the #1 contenders for the World Tag Team Championship. The titles were again not defended in the 2012 tournament. 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. Steen instead defended the PWG World Championship at the event.
In 2013, the World Tag Team Championship was defended in the tournament. However, during the 2014 edition, the reigning champions The Young Bucks (Matt Jackson and Nick Jackson) were not entered into the tournament, and DDT4 would become a #1 contender's tournament for the titles. In 2015, the titles were defended in the tournament and marked the first and only time that the title changed hands in all three rounds of DDT4. It would also be the final edition of DDT4 as the tournament was cancelled in 2016.
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The inaugural DDT4 tournament in 2007 was contested for the vacant PWG World Tag Team Championship while the titles were defended in the 2008, 2009, 2010, 2013 and 2015 editions of the tournament.