Krajicek, who woke up with stomach pains, failed to convert two match points and did not feel well enough to attend a press conference afterwards.
The loss jeopardises the seventh seed's chances of a place in the eight- man ATP Tour World Championship in Hanover next month. There are three places still to be settled with this tournament deciding them.
The former world No 1 Jim Courier was the second high-profile player to fall when France's Arnaud Boetsch defeated him 6-4, 7-5, and later Andre Agassi also departed, beaten 6-4, 3-6, 6-3 by the Swede Magnus Gustafsson.
n Wimbledon's No 1 Court, due to be demolished and replaced by a new stadium on a nearby site for next year's championships, will not be lost to tennis altogether. The grass surface has been bought by Eastbourne Borough Council and Direct Line Insurance, with the help of the Lawn Tennis Association, and will be used in Eastbourne's International Centre at Devonshire Park. The original plan for Christie's to auction the grass has been scrapped.Reuse content