Kildare's Ruby Walsh has been stood down for the rest of the day at Cheltenham after suffering a suspected broken leg.
Walsh's mount Al Boum Photo fell at the second-last fence in the RSA Novices' Chase, and he's been taken to hospital for x-rays.
Patrick Mullins will now ride Douvan in today's feature - the Queen Mother Champion Chase.
Walsh had only returned to the saddle a week ago after four months out with a broken leg.
*File image: Ruby Walsh & Nichols Canyon via the Irish Sun.