Frankie Dettori is unwell and has given up his five rides at Newmarket.
His agent Ray Cochrane said: “He rode work this morning and when he came back he said he felt very unwell.
“I’ve got him five rides tomorrow so hopefully he’ll be back.”
Dettori’s scheduled mounts were Fiddlers Wood for Vince Smith in the 1.45, Anemometer (2.20), Achill Bay (2.55) and Faith And Reason (4.05) for his bosses Godolphin, and the Neville Callaghan-trained Vegas Boys (5.15).
Kerrin McEvoy takes over on the three Godolphin horses with riding arrangements for the other two yet to be finalised.