Kerrin McEvoy's intuition has paid dividends as he disregarded Chris Waller's instructions to boot Dagny to victory in the Eremein Handicap at Rosehill.

McEvoy opted to stick to the rail on the five-year-old mare before he found clear air in the straight in the latter stages of the 1800m race on Saturday.

The $4.20 favourite scored by three-quarters of a length from Harper's Choice ($4.60), with Black On Gold ($14) a short neck third.

"It was a genius ride coming up the fence to save some ground, which proved the difference in the finish," Sydney's premier trainer said.

"I said pre-race she'll be back near last, try and get into a three-wide line and at the 600 get her out in the middle of the track.

"Kerrin did the opposite. That's where the good jockeys can say, "I know what Chris said but I'm going to do this because I'll save myself four lengths'."

Waller said Dagny might head to the Listed Ipswich Cup (2150m) on June 16.

"It might be too much to ask but there's not a lot else around for her. We'll weight up the options later in the week," he said.