Yeats Heads Leger Eight Ascot Gold Cup winner Yeats will face seven rivals in the Irish Field St Leger at the Curragh tomorrow.Aidan O'Brien's charge followed up his Ascot win with an easy success at Goodwood and is a short-priced favourite to notch the third Group One success of his career.O'Brien has not declared Puerto Rico, who was also a late withdrawal from last weekend's St Leger at York.John Oxx's five-year-old mare Kastoria will try her hand at Group One level for the first time after a string of impressive performances this year.Howard Johnson has declared Yorkshire Cup winner Percussionist, with owner Graham Wylie hoping the heavens open for a horse who goes particularly well with cut in the ground.Speaking at a rain-sodden Ayr yesterday, Wylie said: 'We want more of this rain to come in Ireland.'He's over there and we just hope if the rain comes he'll run a decent race.'He's fine. He's been out in the field because he runs best when fresh. So Howard said we'll give him a nice long break and then bring him back for the Irish St Leger if the ground is soft and then we'll take him chasing.'Declan McDonagh has been booked so fingers crossed he'll run a nice race if the rains come.'He's down to a nice racing weight, which is good.'When we first bought him he sweated up quite a lot before his races but he seems to have calmed down a bit. When he ran at York he wasn't sweating so much but he's never been away from home as long as this so we just hope he likes the trip.'The Whistling Teal also makes the journey across the Irish Sea along with Frank Sonata and Akarem.The field is completed by David Wachman's Fracas and Luke Comer's Chimes At Midnight. (C) PA Sport