He was treated on the track before being taken to New Cross Hospital in Wolverhampton for further examination.
Llewellyn said: "He's not broken his leg. It's stiff and he's still in hospital and having treatment on it.
"I've not been told how long he'll remain in hospital. Hopefully he'll be OK and won't be out for too long. It was unfortunate what happened."
Select any odd to add a bet