Istabraq backed for Champion Support for Istabraq`s historic tilt at a fourth Smurfit Champion Hurdle crown appears to be gathering momentum.Aidan O`Brien`s star has been friendless in recent weeks in the ante-post market on the Cheltenham showpiece but William Hill reported good support for the 10-year-old today.'A cash client on the South Coast had a Stg#6000 bet at 9-4 on Tuesday,' said spokesman David Hood. 'And that has been followed up on Wednesday a by a flurry of four-figure wagers.'We are now back to 7-4 from 2-1.'William Hill betting: 7-4 Istabraq (from 2-1), 10-3 Valiramix (from 3-1), 5-1 Landing Light (from 9-2), Ned Kelly, 12-1 Bilboa, 14-1 Marble Arch, 20-1 Azertyuiop, Hors La Loi III, 33-1 Ansar, Geos, Grimes, Westender, 40-1 Regal Exit.