|Royal Ascot 2015|
|Dates: 16-20 June. BBC coverage: Big-race commentaries on BBC Radio 5 live. Results and reports on BBC Sport website|
Gleneagles won the St James's Palace Stakes and headed a 54-1 treble for jockey Ryan Moore at Royal Ascot.
The dual Guineas winner scored by two-and-a-half-lengths from Latharnach (25-1) to give trainer Aidan O'Brien a record seventh win in the race.
Moore went on to clock up wins aboard Clondaw Warrior and Washington DC.
Solow led a French 1-2 in the opening Queen Anne Stakes, while Goldream held off fellow outsider Medicean Man to land the King's Stand Stakes.
Buratino was an impressive winner of the Coventry Stakes and is rated a 12-1 chance for next year's 2,000 Guineas.
Moore clocked up a double when winning the Ascot Stakes on Clondaw Warrior for trainer Willie Mullins, with top jump jockey Ruby Walsh among those celebrating as his wife Gillian owns the horse with a group of friends.
And three-time champion Moore sealed the treble with Washington DC in the concluding Windsor Castle Stakes, bringing up a double for O'Brien.
|BBC racing correspondent Cornelius Lyaght|
|"This was the emphatic win of a champion by Gleneagles.|
|"For a stride it looked as though an enterprising ride by Frankie Dettori on Consort (third) might have nicked it, but then Gleneagles came storming through majestically.|
|"What a Glorious Goodwood showdown there could now be between Gleneagles, rated by Aidan O'Brien as the best miler he's trained - and he's had Rock Of Gibraltar amongst others - and Solow, who swept aside his Queen Anne Stakes rivals. "|
Gleneagles stars on day one
"He's the best in the yard at the minute and the best miler we've ever had," said trainer O'Brien after Gleneagles continued his unbeaten run this season.
The son of leading stallion Galileo showed thrilling acceleration to pick up long-time leader Consort.
Latharnach came through to claim the runner-up spot, with Make Believe a long last of the five runners.
Bookmakers claimed they had suffered one of their worst opening days of the meeting - with Solow, Clondaw Warrior and Washington DC joining Gleneagles as winning favourites.
Some of the edge has been taken off Wednesday's feature race, the Prince of Wales's Stakes with the late absence of the 2014 US Horse of the Year California Chrome after a setback.
Irish challenger Free Eagle, trained by Dermot Weld, heads the field for the 10-furlong contest.
Moore rides Cannock Chase for trainer Sir Michael Stoute, while other contenders include last year's Irish Champion Stakes and French Derby winner The Grey Gatsby.
The Queen seeks her 23rd Royal Ascot winner as an owner, with two horses - Touchline and Pack Together - running in the concluding Sandringham Stakes. She also has Ring Of Truth in the Queen Mary Stakes.
14:30 BST : Jersey Stakes
15:05: Queen Mary Stakes
15:40: Duke of Cambridge Stakes
16:20: Prince of Wales's Stakes
17:00: Royal Hunt Cup
17:35: Sandringham Stakes