The @ELEAGUETV Major: Boston, Challengers Stage & Legends Stage (Qualifier & Group stage) will be played in swiss-format.
— Min-Sik Ko (@minsikko) December 30, 2017
The upcoming Major in Boston will use a Swiss format. While CSGO has been using the Swiss format in 2017, it was widely not popular due to its favorability towards underdogs. We have seen several upsets in 2017 including the Gambit Major win at July 2017.