William Buick is to take some time off as he is currently awaiting results of tests after feeling unwell.
Last year’s Derby-winning jockey missed his rides in France on Sunday, and he has decided to sit out this week before returning.
Buick, who is retained by Sheikh Mohammed’s powerful Godolphin operation, rides principally for trainer Charlie Appleby.
A statement on the Godolphin website said: “William Buick felt unwell this weekend, and will not be race-riding this week.
“He is undergoing tests at Addenbrooke’s hospital and is awaiting the test results before resuming riding.”