Imperial Commander has been ruled out of a return in Saturday's
Betfair Chase at Haydock
after suffering an injury.
The 11-year-old won the
2010 Cheltenham Gold Cup
but burst a blood vessel when
defending his crown
the following year and has not raced since.
Six months later
he tore a tendon
in his foreleg, and has now has a small bone fracture in a hind leg.
Trainer Nigel Twiston-Davies said: "It's nothing dramatic, but he won't be in full work for around six weeks."
He added: "It's disappointing but these things happen.
"We'll see how we get on but the obvious race for him when he comes back is the race at Cheltenham in January (Argento Chase)."
The 2011 Gold Cup winner Long Run is set to head the field for Saturday's race.