Having partnered the Qipco 2000 Guineas favourite in his last two pieces of work, the ever-popular Italian feels the son of Dubawi has developed both physically and mentally from two to three.
After making a winning debut at [Sandown](https://gg.co.uk/sandown-park) in August the Lord Lloyd Webber-owned colt went through last season unbeaten, culminating in claiming Group One glory in the Dewhurst Stakes at Newmarket.
Dettori said: “I’ve ridden Too Darn Hot in his last couple of bits of work. He seems well and he looks physically stronger, he has progressed well.
“He is an exciting horse, he is the champion two-year-old and I’m looking forward to riding him. He is rated 126 and I don’t think I’ve ridden a two-year-old rated higher.
“It (the dip) took him by surprise, but Newmarket can be challenging. He is bouncing around and is very fresh. He has matured well.
“We are three weeks away and it is just a process of building him up and getting him spot on for the Guineas.”
Echoing the thoughts of Dettori is trainer John Gosden, who is seeking a first win in the opening colts’ Classic.
Gosden said: “He is training nicely and we are pleased with him. Frankie sat on him at the weekend, was very pleased with his development from two to three and we are building towards the Greenham with him.
“He is a bundle of energy. He really enjoys his exercise and is very playful. He is like a very hyperactive, ‘I want to get on with it’ kid.
“He is a guy with a lot of energy and I don’t want him to go and have to do a racecourse gallop, he would be much happier going down to Newbury, running over seven and just getting the cobwebs out the way.”
Although the Newmarket handler expects Too Darn Hot to have no problems in getting a mile, he is unsure if he will stay the additional four furlongs of the Investec Derby at Epsom in June, for which he is the general 4-1 favourite.
He added: “He is strong and quick. Obviously I feel a mile would be very much in his compass.
“His mother stayed a mile and a half and his sister was second in the St Leger, yet he had another sister who was purely happy at a mile and a quarter.
“He does have a lot of speed and is very powerful. To that extent you are guaranteed at a mile and a mile and quarter probably, but beyond that I simply wouldn’t know.”