Roly Poly is set to tackle Saturday’s Sun Chariot at Newmarket as second favourite

Happily and Rhododendron strike to increase trainer’s Group One wins to 22 this year

Aidan O’Brien is even money to break 14-year record of 25 Group/Grade One wins in calendar year

Venice Beach also among trainer's entries for world's oldest classic at Doncaster

Top English jockey could secure Group Three hat-trick at Curragh

US Army Ranger takes on Big Orange in Tuesday’s Goodwood Cup

Aidan O’Brien seals Group Two Curragh double with Spirit of Valor and Elizabeth Browning

HQ reopens this weekend amid criticism over holding races during building work

Un De Sceaux remains in contention for Sandown’s Betfair Tingle Creek Chase

O’Brien is optimistic the Coolmore team can enjoy one of its best two days at Santa Anita

Trainer’s trip to Paris vital as he homes in on Frankel’s tally of top-flight victories

Many Ballydoyle horses have failed to make transition to dirt in US’s most valuable race

Doncaster feature could help trainer close in on Bobby Franke’s Group One world-record

Aidan O’Brien moves on to 21 Group One wins with Minding’s QEII success at Ascot

Aidan O’Brien’s No 1 is already favourite for next year’s 2,000 Guineas and Derby

Aidan O’Brien runs a trio of Fastnet Rock newcomers in a two-mile maiden where Dermot Weld’s Vigil makes a first start on the flat

Champion trainer heads for Newmarket after extraordinary Arc ‘clean sweep’

Champion trainer heads for Newmarket after extraordinary Arc ‘clean sweep’

National Defense wins the Qatar Prix Jean-Luc Lagardere at Chantilly