Dubai Golden Shaheen (UAE-I) repeat winner Caller One, currently in Singapore preparing for a race there on May 11, may make his follow-up start in England during the Royal Ascot meet. The Jim Chapman trainee is one of four American horses pre-entered in the Golden Jubilee Stakes (Eng-I), a six-furlong turf dash for horses 3-year-old and older.Chapman is seriously considering the Ascot race, according to a report in the Racing Post."I've talked to the connections of Caller One," Nick Cheyne, Ascot's clerk of the course and racing director, told the paper. "The horse runs in Singapore on May 11 and we hope he might come on to here from there. He hasn't been back to the US since Dubai and there is not a lot else he could go for. I am very confident of Morluc coming."Morluc, Gone Fishin, and Inverstor's Dream are the other three American-based horses pre-entered in the Golden Jubilee -– formerly the Cork and Orrery Stakes. Trainer Richard Mandella has Cagney in the Prince of Wales's Stakes, a race that also attracted Chapman-trained Western Pride. Dura Racing and Springfield Stable's Celtic Hope is among the pre-entrants in the St. James's Palace Stakes.Morluc, who faces Gone Fishin in the $100,000 Aegon Turf Sprint Stakes (gr. IIIT) Friday at Churchill Downs, will also likely make the race and will be ridden by Gary Stevens, according to a track press release.Johannesburg is pre-entered in both the Golden Jubilee and St James's Palace Stakes.For a complete list of horses pre-entered in six Royal Ascot Stakes races click here, Royal Ascot, and scroll down.