Board Thread:Speculation House/@comment-14138255-20151025160919/@comment-80.192.105.94-20151026032153

XDex: As Metallic noted, they must be chosen from that round. It makes a sort of sense - you'd expect the teams to put their best members forward for the doubles, thus encouraging effective pairs. For the singles, you'd want the teams to know who can last well on their own. Essentially it encourages teamwork - they need to know each others' strengths and weaknesses and their capability to work as a team.