Racing: Scorching trial shows southern filly has talent to threaten stablemates

The Reid-Rogerson stable's stranglehold on tonight's $170,000 Magness Sires' Stakes Championship may have been loosened by a breathtaking trial performance.

The R and R stable has dominated the first two legs of the juvenile fillies' Triple Crown, with Flying Pocketlands downing stablemate Sixpence in both races.

And while they are again the pair to beat tonight, a new rival who did not contest their last two features has emerged.

Yankee Dream burnt up the track at the Alexandra Park trials on Tuesday, stunning clock watchers and driver Rhys Fensom.

Yankee Dream, winner of three of her four starts, paced her last 800m in 56.1 seconds, breaking 27 secs for her last 400m.

She won by 12 lengths, a remarkable effort in her first look at Alexandra Park, where she has been stabled with trainer Robert Dunn this week.

And Fensom, who used to work for Dunn and was travelling trainer for his great mare Mainland Banner, was stunned by Yankee Dream's performance on Tuesday.

"She felt like she was only going a half [800m] in 58 seconds, not 56," said Fensom.

"This is a very good filly and she will be very hard to beat this week."

Yankee Dream has the advantage of drawing handy tonight and if she can beat Flying Pocketlands off the gate she could stay in front of the hot favourite.

The latter has looked the best filly in the country and was superior to most of her rivals tonight in her last two starts.