Powerscourt, a controversial third in last weekend's Breeders' Cup in Texas, could be on his travels again with Aidan O'Brien examining the possibility of running the unlucky colt in the Japan Cup at the end of the month.

Jamie Spencer received some criticism for his ride on Powerscourt at Lone Star Park which added to earlier flak after the horse was disqualified from first place in August's Arlington Million.

Despite a Group One success in May in the Curragh's Tattersalls Gold Cup, it has been a "nearly" season for Powerscourt and O'Brien indicated yesterday that the will be given a chance to make up for that by racing on as a five-year-old next season.

"It's possible he will race on next year. He would be a horse to look forward to because he has been unlucky in running this season. The same races would be open to him again," he said before nominating Tokyo in just over three weeks' time (November 28th) as a possible target.

"We will see how he is over the next few weeks. He loves fast ground which they usually get," he added.

A trip after that to Hong Kong's International meeting on December 12th hasn't been ruled out for Powerscourt, nor for the enigmatic Antonius Pius, who looked to throw away victory in the Breeders' Cup Mile by ducking in behind the eventual winner.

"It's more likely than not that Antonius Pius will stay in training as a four-year-old. We're only starting to get the key to him. He might just be one of those horses who does his best without getting hit. He has so much speed that he won't get much further than a mile," said O'Brien.

If Antonius Pius does travel to Sha Tin for the prestigious international fixture it will be for the Mile event but O'Brien stressed he will wait to see how the horse trains after a long season already.

The Ballydoyle trainer also confirmed that Yesterday, who ran in the Breeders' Cup behind Ouija Board, has been retired.

Last year's Irish 1,000 Guineas winner raced only three times in 2004 after a bout of colitis almost claimed the filly in the early part of the season.

Yesterday's career also included Group One placings in the Epsom Oaks, the Prix Vermeille and last year's Breeders' Cup fillies and mare race.