Trainer Tiarnna Roberston has down played any nerves as Fabergino faces the toughest test in her career to date at Ascot on Saturday.

The exciting four-year-old is an odds on favourite to extend her imposing winning record in the Marjorie Charleson Classic (1200m).

A winner at five of six starts, Fabergino takes on a small, but hot field including group and listed winners, Celebrity Dream and Lady Cosmology.

Robertson admits the fifth edition of the Marjorie Charleson Classic is an acid test for Fabergino, but she’s confident the mare will rise to the challenge.

“She will give us a good guide and see where we are at and where we are heading, “Robertson told The Races WA.

“There is no hiding anymore and it’s time for her to step up.”

Fabergino underlined her potential when she made a brilliant return to racing nearly six weeks age following a runaway four length win over My Demi.

It was the daughter of Maschino’s first run back in eight months after she had surgery to remove a bone chip from a troublesome knee.

She was spelled after suffering the only loss of her career to Ambiente last June and the setback ruled her out of the Ascot carnival.

A confident Roberston declared Fabergino was showing no signs of the knee injury that has plagued her for most of her career.

“She has trained on well since her last start,” Robertson said.

‘It was good to see her running through the line.

“On her track work we couldn’t fault her.

“We gave her two weeks in the paddock after that run and let her freshen-up again.

“She runs well fresh and has a perfect fresh record.

“I can’t fault her and she is working really good.

“She is feeling really well and her weight is the same as last start.

“Everything is spot on as it was leading into her first race.

“Knuckey (Peter) is happy with her work and I can fault her.

‘It’s exciting to get her to the races.”

Robertson said Fabergino would lead from barrier two. Regular rider, Peter Knuckey retains the ride.

Tabtouch has Fabergino at $1.75.

Julio Santarelli