Trainer Tizzard completes 4,334/1 Aintree treble

Jockey Robbie Power on Sizing John jumps the final hurdle to win the Gold Cup on the final day of the Cheltenham Festival horse racing meeting at Cheltenham Racecourse in Gloucestershire, south-west England, on March 17, 2017

Trainer Colin Tizzard saddled three winners on the second day of the Grand National meeting at Aintree on Friday as he completed a spectacular 4,334/1 treble.

Cheltenham Gold-Cup winning jockey Robbie Power was aboard the Tizzard-trained Pingshou as it won the Top Novices Hurdle at odds of 16/1.

The same jockey and trainer combination were involved as Fox Norton, a 4/1 chance, triumphed in the Melling Chase.

Tizzard, who is based in Sherborne, southwest England, had his third winner Friday when teenager Harry Cobden rode 50/1 shot Ultragold to victory in the Topham Chase.

The Topham features some of the extra-large fences used in Saturday's Grand National -- Britain's best-known steeplechase horse race and a gambling bonanza, with Ladbrokes, one of the UK's major bookmakers, forecasting £250 million ($310 million, 292 million euros) will be wagered on this year's edition alone.

Cobden's victory was a huge boost for the 18-year-old, coming just a day before he rides Just A Par, another 50/1 chance, in the Grand National for leading trainer Paul Nicholls.

"That was my first spin over the (National) fences. Unbelievable," Cobden told the BBC after riding Ultragold to victory.

"That was his first run over them too and he was back off his winning mark -- I actually fancied him.

"He was very clever, dancing over ditches. There was a bit of carnage at Canal Turn but he knew what to do."

Both Liam Treadwell and Daryl Jacob suffered falls in the Topham and the two jockeys, along with top lady rider Katie Walsh, who was injured on Thursday's first day of the Aintree meeting, will need to be passed fit by the course doctor on Saturday before they can take up their scheduled Grand National rides.

Treadwell, who won the National on Mon Mome for Venetia Williams in 2009, is due to ride another od the trainer's horses in Tenor Nivernais.

Jacob is due to be abord Ucello Conti for Gordon Elliott, with Walsh down to ride Wonderful Charm for Nicholls.