Not focused on 'elite athletes', but is shows that coaches need to be careful of training effects on young athletes.
http://journals.lww.com/nsca-jscr/Abstract/2013/02000/The_Effects_of_Tournament_Preparation_on.8.aspx
http://journals.lww.com/nsca-jscr/Abstract/2013/02000/The_Effects_of_Tournament_Preparation_on.8.aspx