Monday evening's meeting at Windsor is the latest fixture to be threatened by the recent heavy rain.
The course currently has a few waterlogged patches and a 7.15am inspection has been called but an improvement in the forecast is giving officials hope.
Acting raceday clerk of the course Jon Pullin said: "The going is currently heavy with a few waterlogged patches so we will inspect at 7.15am.
"We'll have a look then but as it has stopped raining now and the forecast suggests we will not get any more rain there is plenty of time for it to dry up a bit."
