I don't think LYB would have made any pre-game instructions here. Both are capable of winning the WC. Unless CL is injured. Then LYB probably made sure that LD will win. *Side note: I find mens singles much more entertaining these days. Or mixed. I'm a doubles player myself but the short rallies is a big turn off for me. It seems like for one hour, we get about 10 minutes of badminton.
Lin Dan is such a thinking,analytical player, always studying his opponent and reading his game to anticipate his moves.