Post entry reaches double century Three trainers - Aidan O`Brien (40), David Loder (30) and Sir Michael Stoute (28) - are responsible for almost half of the 201 entries for the Stg£175,000 Racing Post Trophy at Doncaster in October.O`Brien - successful two years ago with Aristotle and with Saratoga Springs in 1997 - has a host of interesting entries including Johannesburg, Rock Of Gibraltar, Roar Of The Tiger, and the unraced Diaghilev, the most expensive yearling ever sold in Europe at 3.4 million guineas.Johannesburg is unbeaten in three starts, including the Group Three Norfolk Stakes at Royal Ascot, Rock Of Gibraltar took the Group Three Railway Stakes, at the Curragh earlier this month and Giant`s Causeway full-brother Roar Of The Tiger has been the subject of good reports since winning a Naas maiden.Of Loder`s 30, Meshaheer stands out following his convincing win in the Group Three July Stakes at Newmarket on July 11th.Stoute, who saddled Dilshaan to take this prize last year, has many promising colts, including impressive Sandown winner Bragadino, among his 28 entries.Henry Cecil, who has saddled the winner of this Group One race nine times, has just two entries - the Pleasant Colony colt Handa Island, an unraced 210,000 yearling purchase at Keeneland`s September Sale, and Sparkling Water, runner-up on his debut at Sandown last month.