Aintree will hold a precautionary inspection at 8am tomorrow to determine whether their afternoon meeting can go ahead.
Temperatures are set to dip below freezing at the Liverpool track overnight, prompting clerk of the course Andrew Tulloch to take an early look.
He said: “This is purely a precautionary inspection in case temperatures overnight fall lower than the expected minus three degrees. There is also the possibility of fog.
“We could have raced today and have every expectation of doing to tomorrow.”