Godolphin’s last start Rosehill winning import Spectroscope has opened favourite in Doncaster Prelude 2017 betting to win again at the track this weekend on The BMW Day.

Godolphin import Spectroscope is favourite in 2017 Doncaster Prelude weekend to make it two from two at Rosehill this weekend. Photo: Steve Hart.

A final field of ten middle-distance gallopers is set to face off in Rosehill Race 4 at 2:15pm (AEDT) on Saturday in this season’s $150,000 Group 3 Doncaster Prelude (1500m).

The race offers a final chance to earn a ballot free ride into Saturday week’s Group 1 Doncaster Mile (1600m) field at Randwick on Day 1 of ‘The Championships’, but hasn’t produced of that $3 million race in the past three decades.

The John O’Shea-trained Medaglia D’Oro stallion Spectroscope heads the latest Doncaster Prelude odds at Ladbrokes.com.au paying $3.60 for the win and getting in on the 53kg lightweight.

The import debuted down under with a 1350m win at Rosehill on March 11 carrying 57kg and will appreciate the drop back in weight as he looks to make it two-from-two at the track.

Occupying the second line of Doncaster Prelude betting at $4.80 and also well-weighted on just 53kg is the in-form Echo Effect for Wyong’s Kristen Buchanan.

Paul King rides the Reset three-year-old from an inside barrier two draw, continuing his association with the up-and-coming gelding.

Echo Effect stepped-up in grade last time out back on February 18 and was only just nudged out of the win going down by a very narrow margin in his second to Man From Uncle in the Group 2 Hobartville Stakes (1400m).

Freshened-up since, he drops from 56.5kg taking on the older horses here and could prove hard to hold out on a mud track having won both of his starts on Heavy going to date.

In a wide open affair there are a further four single-figure fancies including the progressive New Tipperary in barrier four representing Joe Pride.

The four-year-old son of High Chaparral carried 53kg for his second behind It’s Somewhat in the Group 2 Ajax Stakes (1500m) at the same track and distance last time out defeated only a neck.

He gets the chance to go one better on the weekend, peaking three runs into his autumn and out to return to the form that saw him string together three on the trot last season.

The early Doncaster Prelude market mover meanwhile backed in from $8 to $6.50 is Rudy in gate three with Ben Melham in the saddle.

Helen Page saddles-up the Gold Coast raider second-up on Saturday after a third at Doomben under 61kg on March 11.

Rudy comes back to 55.5kg for the weekend, racing in Sydney for the first time since December and out to atone for his poor Rosehill (4-0-0-1) record.

Working in his favour though is the predicted Heavy Rosehill track for the weekend’s racing, the gelding boasting four wins and a second from six goes in the mud.

Other key fancies the bookies are taking no chances with include the Darren Weir-trained Kenjorwood ($7.50) and the returning Chris Waller-trained Marenostro ($9).

See below for the full Doncaster Prelude 2017 field, barriers, jockeys, weights and current markets provided by Ladbrokes.com.au – home of Odds Boost (T&Cs apply).

2017 Doncaster Prelude Field, Barriers & Odds