Racing at Warwick Farm remains in doubt with heavy rain persisting in Sydney.

Officials will inspect the western Sydney track around midday on Friday and also assess Rosehill which is the replacement venue.

Around 80mm has fallen at Warwick Farm and the same at Rosehill.

The meeting features the $2 million Inglis Millennium for two-year-olds and $1 million Inglis Sprint.

Stewards will also inspect the Canterbury track ahead of Friday night's meeting.

Rosehill, Warwick Farm and Canterbury were all rated heavy (9) on Friday morning.