Henry Cecil will have to remain on edge until Saturday afternoon, but the Qipco 2000 Guineas preparations for Frankel were virtually completed on Tuesday morning.
The nerves have been evident with Cecil all season as he trains a colt who is now the hottest favourite for the first Classic of the season for 40 years.
Unbeaten in four starts at two, Frankel made a smooth return to the fold in the Greenham Stakes at Newbury on 16 April.
His rivals have been dropping by the wayside ever since, and Cecil was pleased with his exercise on the Newmarket gallops.
'He did his final quiet piece of work this morning. I'm delighted with him, but we've still got four days to go,' said Cecil.
'It was just with a lead horse, a nice second canter and we let him go on for the last furlong. He was relaxed and settled well. He's in good form and I'll be surprised if he's not a better horse now than when he ran at Newbury.'
Ed Dunlop also put the finishing touches on his Craven Stakes winner Native Khan, who worked under Kieren Fallon on Tuesday despite the rider being suspended this weekend.
Godolphin's Casamento is another who appears set to take his place in the line-up.
Winner of the Racing Post Trophy for Michael Halford as a juvenile, it had been thought he was more of a Derby contender for Sheikh Mohammed's operation.
But after another new recruit, Dubai Prince, was ruled out of the race through injury, Mahmood Al Zarooni and his team have had a rethink.
Godolphin racing manager, Simon Crisford, said: 'Sheikh Mohammed saw him last night and he was very pleased with what he saw.
'There's a strong possibility that he will turn up on Saturday, but the reason we are sitting on the fence a little is because we always felt a mile and a half will be his best trip and we think he'd have a great chance in the Derby.
'We've got to try to do what's best for the horse. We think he's got enough speed for a mile and he's going very well so it will either be the Guineas or the Dante. There's a strong chance he'll run, we just need the green light.'
Godolphin will also be represented by Champagne Stakes winner Saamidd.
Connections of Rerouted insist he will be running on his merits - and not just as a pacemaker for Frankel.
The Barry Hills-trained Rerouted is owned by Khalid Abdullah, who also owns the market leader, but the Tattersall Stakes winner is also there to do his best.
As he likes to force the pace anyway, Rerouted would be adopting the same running style if Frankel was there or not.
'Rerouted will be there to help ensure there is a true and sensible pace for Frankel in the 2000 Guineas,' reported www.barryhills.com.
'However, these kind of tactics suit his running style and he will be running on his merits. We could possibly put blinkers on him to make sure he concentrates as he was looking around in the Free Handicap and pricking his ears.
'He has been working really well with good horses at home, such as Prime Defender, and although it looks unlikely we'll beat Frankel, hopefully we can play for a place.'
Clerk of the course Michael Prosser said of the Newmarket ground: 'Today it's good to firm, good in places. We have been watering heavily since the Craven meeting and are again today.
'The forecast is for cooler temperatures between Tuesday and Friday, largely dry but there is a possibility of precipitation from Thursday night into Friday, and possibly showers on Saturday.
'We will have to be careful about irrigating and will reassess on Thursday.'
