The Clarence House Chase looks set to be run on heavy ground on Saturday after the going was changed following 11mm of rain overnight on Thursday.
There are currently no plans to hold an inspection despite the downpour, with only light showers expected today and a colder and drier spell forecast for raceday.
Clerk of the course Chris Stickels said: "We have had 11mm overnight, the ground has been changed to heavy. There are no areas I'm concerned about. The only rain forecast are showers, we've seen the worst of the rain and it's forecast to be dry and cool tomorrow."
Un De Sceaux is likely to revel in the ground conditions for the 2m1f Grade 1 with the Willie Mullins-trained 12-year-old a winner of four of his five starts on going described as heavy.
He faces a rematch with Tingle Creek conqueror Defi Du Seuil, who has yet to race on heavy but has won six of his seven starts on soft. Philip Hobbs's runner is the current 4-5 favourite with Paddy Power, while Un De Sceaux is a 6-4 chance to land a fourth success.
Saturday's meeting at Haydock has also been changed to heavy after 6mm of rain fell on Thursday evening. The track, which hosts four Grade 2 contests including the Peter Marsh Chase and The New One Unibet Hurdle, could face further showers on Friday evening.