What is the difference between Round Robin and Double Elimination format?

Round Robin format: teams get placed into equal pools (groups) of between 4-7 players. Players in each pool will play each other to determine a table standing from that pool. Two players from each pool (four if one pool) will then progress through to a final’s series. 

Double Elimination format: a knockout draw that consists of a top draw and back draw. The top draw is an elimination draw where winning players progress until the last two winners compete for the Gold/Silver medal.

Players who lose in the top draw receive a second chance and drop down into the back draw as it progresses. If a player loses in the back draw they are knocked out. The final two players play off for the Bronze medal.