Michael Walker will appeal the severity a Sandown suspension that threatens to rule him out of a Group One ride in Sydney.

Walker is booked to ride Brave Smash in the Canterbury Stakes at Randwick on March 9 along with Aquis Farm-owned two-year-olds Dubious in the Todman Stakes and Queensland-trained filly Vincere Volare in the Reisling Slipper Stakes.

He was handed a 10-meeting suspension by Racing Victoria stewards at Sandown on Wednesday for careless riding after winning aboard Eighteen Carat.

Walker pleaded guilty while stewards deemed the interference in the mid-range.

The jockey's ban begins after Saturday's Australian Guineas meeting in which he rides Extra Brut for Ciaron Maher and David Eustace, ending at midnight on March 11.

Walker will need the suspension reduced to seven meetings to enable him to ride at Randwick.