Ralph Beckett made the decision to add Moonstone Magic to Sunday's QIPCO 1000 Guineas field on Monday in the hope of rain-softened conditions at Headquarters and his only worry is that this will by his filly's third run since mid-April.
"I'm very happy with her and I'm very glad about where we are at the moment," said Beckett.
"The only concern I have is that it's her third run in three weeks, but she seems in good shape at home.
"As things stand with the ground and with how the filly seems in herself, I'm very happy.
"There is no wind in Newmarket at the moment and, obviously, the less the ground dries out the better for us.
"We're going into it with our eyes wide open."
Mashoora was a very cosy winner of the Prix Imprudence on her seasonal reappearance and Rouget is just hoping the mile does not prove beyond her stamina limitations.
He said: "She ran quite well over a mile last October . I think she could be better over seven furlongs, but we have to try (a mile).
"She was fitter than the colt (Abtaal, 2000 Guineas) for her trial, but she has been in good form since the race and we will see what the opposition is made of."
The Fugue was a ready winner on her debut at this track in late October and stable jockey William Buick has chosen to ride her instead of Starscope.
Gosden said: "She's only had the one run when she was very impressive but it was never the intention to go for a trial with her.
"She's been pretty slow to come to hand but we took her for a racecourse gallop.
"She's in good form but she would have preferred the last deluge of rain not to have fallen.
"Just before Wednesday night's rain it was good to soft ground - and that would have been fine for her.
"It is now on the slow side of good and that is not entirely in her favour."
Starscope has had a run this season, when beaten just a length in the Nell Gwyn Stakes.
Gosden said: "I was very pleased with how she finished in the Nell Gwyn.
"She wants a mile and she's by Selkirk, so if it remains wet that will suit and make it more a test of stamina.
"We put the hood on as she has a bit of nervous trait to her character, but nervous energy is an important part of the race."
The Charlie Hills-trained Gray Pearl won on her introduction at Newbury last August and was third on her only other start in the Rockfel Stakes.
She is a big outsider for Sunday's contest but with the ground and trip but likely to suit, Hills believes she could get involved in the finish.
He said: "I don't think the softer ground at Newmarket will be a problem - I think she might prefer it that way - and the mile won't be a problem, either.
"She has done very well over the winter. She is a big, scopey filly with a good cruising speed and I am looking forward to running her.
"She ran a great race in the Rockfel and obviously had a lot less experience than the other fillies.
"She is very straightforward and I think she is pretty useful so she should run a big race."