There has been no play so far, and is unlikely to be until at least 1630 GMT.

A number of matches have already been cancelled including those involving Martina Navratilova, Venus Williams, Roger Federer and Goran Ivanisevic.

Officials are hopeful that Andy Roddick and Guillermo Coria will complete matches, and that Greg Rusedski will begin against Davide Sanguinetti.

Delays on the first two days of the Championships have left organisers 45 matches behind the schedule.

Should the bad weather continue, options open to the referee's office are to start play earlier or use the middle Sunday, although that decision is some way off.

In Wednesday's remaining scheduled matches, Roddick leads Taipei qualifier Yeu-Tzuoo 4-2 and Coria's match against Wesley Moodie goes into a third day, with the Argentine third seed 5-3 up in the final set.