The qualification equation is exceedingly simple but brutally tough. Finish the season in the Top 8 and you're in. Tomas suffered a serious blow in his attempts to make his way into the year ending Barclays ATP World Tour Finals in London next November after losing in the first round of the China Open in Beijing.
Berdych's Asian campaign will next take him to the Shanghai Rolex Masters, an ATP World Tour Masters 1000 tournament. Last year he lost in third round to Gilles Simon = 90 ATP points to defend.
... then Stockholm (ATP 250), Basel (ATP 500), Masters 1000 Paris-Bercy. Good Luck!