The Don Cantillon-trained 11-4 favourite threw down a strong challenge to hit the front around a furlong out and while it looked like he might go on to win well, in the end he had to dig deep before getting the verdict by a length and a quarter.
Dettori was in flying dismount mood afterwards and keeping his fingers crossed he hits the landmark at Ascot in the Shergar Cup on Saturday.
He said: “Only two more to go, and it would be great if I could do it at Ascot. One of them is favourite tomorrow and I have another couple of good chances, so it’s still possible.
“It’s the place 20 years ago that I had my seven out of seven and it would be a good touch to do it there.”
Seniority came out best in what might prove to be an informative running of the Weston Group Maiden.
Zefferino was sent off at 8-15 to become the latest progeny of Frankel to shine on the racecourse and travelled sweetly for much of the journey under Andrea Atzeni, who still appeared to have lots of horse underneath him two furlongs out.
But the William Haggas-trained winner had moved well himself and got a lovely split up the far rail, and as the two settled down for a brief battle inside the final furlong, it was the Queen’s horse who proved half a length too good in a race won by the useful Emotionless 12 months ago.
Assistant trainer Maureen Haggas said of the 7-1 victor: “He goes OK at home, but he hasn’t shown a huge amount.
“He’s been a bit of a boy - he roared going down to post and roared for the first three furlongs.
“He’s got a lot to learn, and it looked a nice field on paper and he couldn’t have done any more than he did.”
- Rachael Blackmore is set for a spell on the sidelines after she broke a bone in her wrist at Galway last Sunday.
Having won the opener aboard Camlann, Blackmore was brought down on Oisin James in the second.
She rode in a further two races, but an X-ray later revealed the break.
Her agent Garry Cribbin said: “Rachael was brought down from Oisin James at Galway on Sunday, and an X-ray showed she broke a bone in her wrist.
“She had a pin inserted in the wrist this morning and she will be on the sidelines for four to five weeks.”