For the second consecutive year , there are 16 seeds ( an decrease from 32 between 2012 -- 2015 ) with all seeds exempt until the Last 32 stage .
For the second consecutive year , there can not play each other until the Last 16 stage .
For the second consecutive year , there are 16 seeds ( an decrease from 32 between 2012 -- 2015 ) with all seeds exempt until the Last 32 stage and can not play each other until the Last 16 stage .