There are more trophies up for grabs this year

The highlight of the first day of the meeting is the St James's Palace Stakes.

English and Irish 2,000 Guineas winner Rock of Gibraltar is an odds-on favourite to achieve a rare treble in the one mile contest.

If successful, it would be the third year in a row that trainer Aidan O'Brien has won the race.

Rock of Gibraltar's main rival is likely to be French 1,000 Guineas winner Landseer, who is also trained by the master of Ballydoyle.

But it is O'Brien's great training rival Godolphin who have the antepost favourite for the opening race of the meeting, the Queen Anne Stakes.

Best of the Bests landed the Prix d'Isapahan last month but could face stiff competition in the Group Two one mile race from the improving Nayyir and Frenchman's Bay, who was third in last season's 2,000 Guineas.

The first sprint of the meeting is the King's Stand Stakes, a Group Two five-furlong dash, which could see Sir Mark Prescott's first runner of the season in the form of Danehurst although Kyllachy is likely to be the one to beat.

Other shorter races include the Coventry Stakes, in which O'Brien, who won the race last year with Landseer, will run his maiden winner Spartacus and the Balmoral Stakes, a five-furlong handicap.

The longest race of the opening day is the Duke of Edinburgh Stakes, a handicap run over 1� miles.