Dandalla led home a one-two for owners Nick Bradley Racing in the Duchess Of Cambridge Stakes at Newmarket.
The brilliance of her performance in the Albany Srakes at Royal Ascot was missing but the even-money favourite went to the front inside the distance and toughed it out well close home.
Fev Rover (20/1) was the challenger in the owner's red cap and finished strongly to be beaten only a head.
Outsider Santosha was another to come home powerfully and was only half-a-length away in third.
Paddy Power cut the winner to 4/1 from 5s for the Prix Morny at Deauville while she is unchanged at 16/1 for the QIPCO 1000 Guineas with the same firm and Betfair.
Winning rider Ben Curtis told ITV Racing: "She's tough and game and has a great attitude and I think the ground was a bit sticky for her today. It's a bit softer than it was at Ascot and she didn't travel like she did that day.
"She had a lot of ability and a lot of guts to get home in front. At the end of the race I was trying not to give her too hard a time and do it hands and heels. I could hear them coming but she had her head down to the floor and held on.
"She has a great mental attitude, the looks to go with it and evidently the ability to go with that. She has a lot of the ticks needed."
Burke was also of the opinion underfoot conditions were against his star filly – and revealed a minor hiccup during her preparation.
He said: “She is tough and a very high quality filly. Ben was adamant the tacky ground didn’t help her – she is a good actioned filly and it was wetter at Ascot, where she got away with it.
“We had a small issue about 10 days ago with a slight temperature. It wasn’t plain sailing going into it and we took a bit of a chance, but we got away with it. Last weekend we weren’t sure about running, but she scoped good on Monday and we decided to give it a go – it’s onwards and upwards from here.
“We will give her a short break now as she has had three quick-ish runs. The Prix Morny is in the middle of August, so we have got a bit of time and we can give her two or three weeks and prep her for that.
“She is in the Prix Robert Papin, but wouldn’t go there. There is the Lowther at York, but she has a Group Two penalty now and it makes sense to have a crack at the boys in a Group One, if she is fit and well.”
Comparing Dandalla to his recently-retired stable star Laurens, Burke added: “She is definitely more precocious than Laurens. Whether she is better in the long run, time will tell. She has got a long way to go to emulate her, but she is a very good filly. It is amazing to get another good one so quickly after Laurens.”
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