Monarchs Glen's Wolferton Stakes win capped a fantastic day for trainer John Gosden and jockey Frankie Dettori - it was their third success on the opening day pn Tuesday of the 2018 Royal Meeting following victories with Calyx in the Group 2 Coventry Stakes and Without Parole in the Group 1 St James's Palace Stakes.
Monarchs Glen, owned and bred by Khalid Abdullah, was also a second win for Frankel, also sire of Without Parole. The four-year-old beat Euginio by a length at odds of 8/1.
Gosden, for whom it was a 46th Royal Ascot winner, said: "He's run a great race. Frankie was tucked away in a pocket on the inside but got out - it isn't easy to get out. He hasn't lost it yet, the old boy!
He's a little bit wild, this horse. Everyone at home, my fantastic staff, has worked hard with this horse. It didn't work out in Dubai [he finished 14th of 15 in the G1 Dubai Turf in March] but we came back and we've done lots of sensible stuff with him and haven't overworked him.
"He could yet go up in grade as long as he settles enough in his mind. He wants to do everything in a hurry, but we're thrilled with him today."
"I was clear in my mind that if we didn't win the Coventry and the St James's Palace Stakes then it was going to be a very long week, because they were two horses just coming absolutely to perfection. All three are owner-breeder horses, and we are lucky enough to train them. It's been a very fulfilling day.
"Tomorrow we run Cracksman [in the G1 Prince of Wales's Stakes] - I'm very happy with him. Things didn't quite go to plan at Epsom [he narrowly won the G1 Coronation Cup but had to work hard to do so] but the ground here is genuinely good to firm and we're hopeful of a huge run."
Frankie Dettori recorded a 86.75/1 treble on day one of Royal Ascot and his 59th victory overall at the Royal Meeting.
Dettori was delighted to register his third winner of the day.
Monarchs Glen was having his first run in Britain since disappointing in the Group 1 Dubai Turf at Meydan in March and ran on strongly on the far rail to score by a length.
Dettori said: "I took a chance by going on the inside rail and it worked out - I didn't expect Monarchs Glen to win.
"It opened up really nicely on the rail and I got a clear run through. When I got to the front, I was half shaking my head thinking I can't believe this has happened to me - it's a fantastic day.
"Three rides, three winners at Ascot is special. I missed the meeting last year and I'm making up for it here.
'To have three winners in a week is amazing, but to have three winners in one day at Royal Ascot is unbelievable.
"I love Ascot. It has been so lucky for me and it's been a great team effort - John Gosden is on fire. When the outsider even wins, you know you've had a good day.
"I have some great rides still to come - I didn't expect three today and I'm looking forward to riding Cracksman [Prince of Wales's Stakes] tomorrow."
Dettori picked up a seven-day ban for whip use above the permitted level from two furlongs aboard Without Parole in the G1 St James's Palace Stakes and was fined £4,300.
Dettori has been the QIPCO Royal Ascot Top Jockey five times (1997, 1998, 1999, 2003 & 2004), with his best total being seven winners in 1998.
33/1 chance, Euginio, delighted his connections with a length second to Monarchs Glen (8/1).
Tony Nerses, racing manager to the Fastnet Rock four-year-old colt's owners, Saleh Al Homaizi and Imad Al Sagar, said: "I was delighted with that performance. He is a tough genuine horse.
"The draw wasn't ideal but he overcame it. He was ridden to perfection by Silvestre (de Sousa).
"We are very happy. There is still better to come from him.
"Everything is open to him from here."
5.35pm Wolferton Stakes (Listed)
1 Monarchs Glen (Khalid Abdullah) John Gosden 4-9-08 Frankie Dettori 8/1
2 Euginio (Saleh Al Homaizi & Imad Al Sagar) Richard Hannon 4-9-03 Silvestre de Sousa 33/1
3 Muntahaa (Hamdan Al Maktoum) John Gosden 5-9-03 Dane O'Neill 33/1
7/2 fav Mirage Dancer (5th)
Distances: 1, 1
Time: 2m 3.71s
Tote Win: £7.90 Places: £2.90, £9.80, £9.90 Exacta: £311.30
John Gosden - 46th Royal Ascot winner
Frankie Dettori - 59th Royal Ascot winner