Talented apprentice Clint Johnston-Porter scored the biggest win of his career when he outrode his claim on Silverstream in the Group 3 A.J.Scahill Stakes (1400m) at Ascot yesterday.

Johnston-Porter, who commenced his apprenticeship in 2013, timed his run to perfection on Silverstream, storming home from last and weaving his way between runners down the centre of the track.

The Adam Durrant-trained mare, who started at $6.40, defeated Properantes by a neck with Django a length away third.

Lone interstate raider, Ulmann, from the Darren Weir stable, started favourite, but faded to sixth after going forward and finding the front soon after the start for jockey, Brad Rawiller.

“I am speechless after that,” Johnston-Porter said.

“She was ready to rumble and I just needed to get a gap.

“I got a bit of luck in the straight and she burst through.

“Obviously, I have just outridden my claim and I’m pretty happy.”

Silverstream rebounded quickly to win the $250,000 Scahill Stakes after a minor setback.

The daughter of Al Maher won the Group 3 Northerly Stakes (1400m) and Group 2 Lee Steere Stakes (1400m) before a luckless 13th in the Group 1 Railway Stakes (1600m) in November.

Trainer Adam Durrant had planned to tackle last week’s Group 1 Kingston Town Classic (1800m) with the six-year-old, but was forced to rule her out of the $1 million feature after she suffered a foot abscess.

Durrant claimed his second Scahill Stakes triumph after preparing Proart in 2009.

Meanwhile honest mare Volkoff landed a second stakes victory with a strong performance to take out the $100,000 Listed Crawford Stakes (1000m).

Backed from $2.30 to $1.90 favouritism, the Gary Crispin-trained Volkoff, in a field of four, finished strongly for jockey, Jason Whiting, to score by a length.

Chris Gangemi’s Durendal was held up for clear running at the top of the straight, but rocketed home late to grab second with Tenterden finishing third.

Volkoff, who won the Listed Miss Andretti Stakes (1100m) in January, improved her record to 10 wins from 29 starts with stake earnings of $406, 475.

“It worked out perfectly and it was a good result in the end,” Crispin said.

“She is just the perfect mare who is never a problem and chills out at the races.

“We have always had reasonable expectations about her, but to win two Listed races is a great achievement for me and her.”