A brilliant debut by the Darley filly Montsegur has placed her among the stable's top bracket of two-year-olds, at the same time revealing there is more to earning a start in the major juvenile races than merely winning.

Montsegur cleared out for an impressive win in the Joe Brown Plate (1000m), her effort putting her alongside stablemate Safeguard as the two best youngsters trainer Peter Snowden has produced this season.

"She's always shown that she's above average and she looked it today," said assistant trainer Paul Snowden.

"I know she's good because I can't work any other two-year-olds with her or Safeguard."

But to win race like the Blue Diamond Stakes or the Golden Slipper, the timing needs to be right, and that's where Snowden and his father Paul face a slight dilemma.

As with Safeguard, who won at Flemington last Saturday, Montsegur has come onto the scene at a time that is less-than-ideal for the Blue Diamond which is run at Caulfield on February 23.

From a Golden Slipper perspective, they would have made their debut a little later in the season.

"But you've got them there so you've got to bring them to the races," Snowden said.

Snowden said the stable now faced a difficult choice of either keeping Safeguard and Montsegur in training for a while longer or sending them straight to the paddock and making a decision on which race to tackle in the next few weeks.

"Dad is coming down from Sydney tomorrow to have a look at them," he said.

"It's a sticky situation ... they can be so fragile at this stage of the careers."

Montsegur ($7) scored by 3-1/4 lengths from the favourite Calcatta ($1.90) with a further 1-1/2 lengths to Register ($15) in third.

Montsegur's win continued the outstanding run for Darley gallopers who won seven races in two states on Saturday.

It was also the first city winner for her sire New Approach, who was raced by Princess Haya of Jordan and won the 2008 Epsom Derby.

AAP T