18 November 2011 Last updated at 13:24

Kauto Star's future hangs on the Betfair Chase at Haydock

Kauto Star's owner Clive Smith says he will retire the racehorse if he does not perform well in the Betfair Chase at Haydock on Saturday.

The 11-year-old faces competition from Cheltenham Gold Cup winner Long Run, as Kauto Star seeks to win the race for the fourth time.

Trainer Paul Nicholls says there are "no excuses" and he believes the steeplechase star will run a "big race".