Champion jockey Ryan Moore will not return to the saddle until Friday at the earliest.
Moore had been booked to ride Michael Stoute's Profondo Rosso in the oddschecker.com Maiden Stakes at Brighton today, but was replaced by Kieren Fallon.
He had been pencilled in for a couple of rides at Ffos Las tomorrow, but his name did not appear on the final card.
Currently lying third in the jockeys' championship, Moore injured a wrist in a fall from Rocket Rob at Windsor on August 9.
Cosmos can be star at St Leger, says Gosden
John Gosden is happy with the preparation of his Ladbrokes St Leger candidate Arctic Cosmos.
The son of Derby winner North Light has progressed in leaps and bounds this season, winning an all-weather handicap at Kempton off a mark of just 78 in June before finishing second to Monterosso in the King Edward VII at Royal Ascot. His Classic claims were made clearer when he was a fast-finishing third in the Gordon Stakes, a traditional Leger trial at Goodwood.
"There is a stand-out favourite in the race this year (Rewilding) but you can never run away from one horse and his (Arctic Cosmos) form certainly stacks up against the rest," said the Clarehaven handler.
Knight hoping to cash in on Palace potential
William Knight is convinced there is a big prize to be won with Palace Moon following his fine run at York last week.
The former Hughie Morrison-trained five-year-old finished fourth in the City Of York Stakes behind Yaa Wayl.
Knight is seriously considering the Group Two Eddie Stobart Park Stakes at Doncaster's St Leger meeting for his next race.
"There is a definite possibility Palace Moon could go for that race. It is very good prize money," said Knight.
Decision due on Blue's bid for Melbourne Cup
A decision on Illustrious Blue's participation in the Melbourne Cup is likely to be made at the end of the week.
William Knight's stable star was beaten two lengths into fifth behind Opinion Poll in the Lonsdale Cup, where he carried a 3lb penalty.
"He came out of the race fine," said Knight. "He just got going too late. They didn't go that quick and it turned into a bit of a sprint. The race wasn't really run to suit him. Things still haven't been decided about Australia. There will probably be a decision made at the end of the week."