One-time boom filly Politeness is starting to live up to the early hype but faces her first big test of the season in Saturday's Thousand Guineas Prelude.

The Robert Smerdon-trained filly emerged on the scene amid fanfare earlier this year but failed to meet her trainer's expectations with three unplaced runs as a juvenile.

Smerdon has brought the filly back through the provincials in her two starts as a three-year-old and the daughter of Street Sense has been dominant scoring soft wins at Sale and Seymour.

"She has always shown us plenty and didn't deliver in her first preparation. But with a bit of maturity this time and riding her a bit more quietly hopefully she can realise her full potential," Smerdon said.

"She's had a couple of soft wins at lower levels but she's stepping up to the A-graders on Saturday."

Smerdon's took Politeness to the provincials to boost both her prize money and confidence.

Her six-length maiden win at Sale was followed by a 2-1/4-length success at Seymour.

On raw ability Smerdon believes Politeness can measure up in Saturday's race on her way to next month's Group One Thousand Guineas (1600m) for which she is on the second line of betting behind dual Group One winner Guelph.

"But there's a level of pressure she's going to be subjected to and the only way to get the answer to that is to give her the opportunity," the trainer said.

There were 13 fillies nominated on Monday for the Thousand Guineas Prelude (1400m) including the David Hayes-trained pair Gregers and Bulbula, the Peter Moody-trained Kiss A Rose and Darley's stakes winner Montsegur.

Ben Melham retains the ride on Politeness with Smerdon saying the filly has continued to do well since her latest win.

"She just seems to be training on an improving all the time," he said.

"Her coat is cleaning out and she's looking better week by week."