See Thomas Laybourn's comments on the Dutch Open. It seems after the trips out to the far east, the mind and body may not have readjusted for optimal performance. Clark/Robertson seem to have had the same problem with difficulty against pairs one would normally expect them to have comfortable wins against. The Chinese/Indonesians seem to have realised this and stayed away. Hence the larger entries in the German Open which offers the same number of ranking points. The M'sians might be thought of being less affected since the previous ranking tournment was on home ground. Doesn't seem to affect Koreans though!