Switching Wednesday's city meeting to the Geelong Synthetic track caused the loss of a race but it has created opportunities for trainer Robbie Griffiths.

Sandown was scheduled to host the meeting but Racing Victoria decided to give the track time to recover from recent use.

Griffiths has further to travel from his Cranbourne base to Geelong will start nine runners, including three in the Charles Rose Jewellers Handicap (1300m).

Al Hamza, Prix D'Or and Solar Rock are among 11 acceptors and the latter two will both shoot for a hat-trick of wins on the Geelong Synthetic track.

Griffiths said Prix D'Or and Solar Rock were better hopes than Al Hamza but Solar Rock was not certain to take her place in what could be a crucial race for the filly.

The trainer said Solar Rock could be in the final stages of her career despite building a solid record of two wins and two placings from six starts.

"Whether she runs I'm not sure. She was scratched the other day (June 20) because her blood wasn't 100 percent," Griffiths said.

"I haven't got the results back from the pathologist on her latest test yet so we'll wait until we see those."

Solar Rock is a daughter of Encosta De Lago out of a stakes-winning sister to champion stallion Fastnet Rock, meaning Solar Rock's broodmare value would soar if she became a city winner.

Prix D'Or will provide a stiff test for his stablemate if he continues the form that landed him successes on the Geelong Synthetic track on May 27 and June 17.

Griffiths said Prix D'Or has improved markedly since he was gelded in the autumn but the timing of his preparation meant the three-year-old would only run on the Geelong Synthetic track this time in.

"He hates the wet so that's why he's only running on the synthetic track so moving the races to Geelong creates a window of opportunity for him to become a city winner," Griffiths said.