The middle-distance international circuit moves to Singapore on Sunday, with familiar foes Presvis, Wigmore Hall, and River Jetez part of an expected 13-horse field in the Group 1, $3 million Singapore Airlines International Cup.Making his third start in the race, Presvis won the $5 million Dubai Duty Free over about 1 1/8 miles on March 26 at Meydan, but, turned back to a shorter trip in the April 25 Champions Mile at Sha Tin and caught well behind a moderate pace, Presvis could only rally for sixth. Stretched back out to about 1 1/4 miles in the Singapore Cup, Presvis should be more effective, though his late-running style will always leave him at the mercy of luck. This is another race in which Presvis has started twice before: He was second in the 2009 edition but just fifth last year.The Mike de Kock-trained mare River Jetez finished second to Presvis in the Duty Free and ran into several spots of trouble when he ran sixth last out in the Queen Elizabeth II Cup over this same 2000-meter trip in Hong Kong. Hong Kong-based California Memory finished a fast-closing second in the QE II and could prove a major player on Sunday. The Godolphin-owned Calvados Blues finished third in the Dubai Sheema Classic but has battled a foot problem this week. Wigmore Hall, a troubled third in the Duty Free, reportedly did not handle right-handed turns last out in Hong Kong and may better appreciate Singapore’s left-handed course.◗ Marcellina is the horse to beat in the $2.48 million Group 1 Japanese Oaks on Sunday at Tokyo Racecourse. A winner in 3 of her 4 starts, Marcellina exits a three-quarter-length victory in the Group 1 Japanese 2000 Guineas, where she held off Whale Capture, the other major contender in the Oaks.