<p>Observer's odds, form, and racing record — is this their moment? Check out what the experts think.</p> <p>Observer heads into The Vase at Moonee Valley as the favourite, with expert Simon Marshall backing the horse despite the short price. The significant jockey change sees Mark Zahra replacing Ethan Brown in the saddle for trainer Ciaron Maher, and Marshall is confident Zahra can overcome the outside barrier draw.</p> <p>Observer's last-start effort in the Caulfield Guineas tells a compelling story of resilience. Despite being badly held up and locked away, the three-year-old refused to give in, digging deep and rallying to the wire. That fighting spirit caught Marshall's attention, particularly as The Vase serves as a crucial Derby lead-up.</p> <p>Marshall expects Zahra to position Observer in the front six early before looking the winner a long way out in the 2040m contest.</p> <p><a href="https://www.sportsbet.com.au/horse-racing/australia-nz/moonee-valley/race-9-9759567">Markets available here.</a></p>