Ascot have come up with a contingency plan to ensure that six races take place at Saturday's fixture.
The condition of the round course has been a source of some concern and heavy rain is forecast.
Ascot have duly agreed a plan with the British Horseracing Authority that would see an extra race on the straight course and the division of one of the existing races.
Two contests on Friday's card have also been divided in case the round course is out of action.
At present eight races are scheduled, with those on the round course at the beginning of the card.
Nick Smith, head of communications for Ascot, said: "With racing on the round course highly questionable, we took the step of approaching the BHA this morning to look at options to create six straight course races on Friday evening alongside the two round course races, which we may lose.
"Splitting two races, whilst arguably not ideal, will enable us, if necessary, to provide a six-race card as required by the rules of racing.
"In addition we asked the BHA Executive to ensure that six races take place on the straight course on the Saturday.
"As a result, an extra race has been programmed, and a further race will divide at declaration."
