Alvarado finished in fourth place in the Grand National at Doncaster last year . Fergal O'Brien says the horse is in better shape this time around . Alvarado has run only once this season at Aintree in February .
Alvarado finished in fourth place in the Grand National at Aintree last year . Fergal O'Brien says the horse is in better shape this time around . Alvarado has run only once this season at Doncaster in February .