Mongolian Saturday, the winner of the Breeders’ Cup Turf Sprint at Keeneland last October, will have his first start of 2016 in Sunday’s $1,289,191 Chairman’s Sprint Prize at Sha Tin Racecourse in Hong Kong. The Group 1 Chairman’s Sprint Prize, run at six furlongs on turf, was not intended to be Mongolian Saturday’s first start of the year. The 6-year-old gelding was scratched from the Al Quoz Sprint in Dubai last month after developing an illness following a flight from the United States. Owned by Ganbaatar Dagvadorj and trained by Ganbat Enebish, Mongolian Saturday faces a field of remarkable depth. The race is led by Buffering and Peniaphobia, the first and third finishers in the Al Quoz Sprint on March 26; Chautauqua, the winner of the Group 1 T.J. Smith Stakes at Randwick in Australia on April 2; and Aerovelocity, who won Grade 1 and Group 1 turf sprints in Hong Kong and Singapore last year. Aerovelocity missed a start in Japan in March because of a bout with colic. A 7-year-old gelding, Aerovelocity won the Centenary Sprint Cup in Hong Kong in January, his only start this year. The richest race on Sunday’s Sha Tin program is the $1,804,867 Champions Mile on turf. The Group 1 race is led by Maurice, the Japanese Horse of the Year in 2015. Unraced this year, Maurice has won his last six starts, including the Group 1 Hong Kong Mile at Sha Tin last December. Maurice has 11 rivals, a group led by Giant Treasure, who was second in the Hong Kong Mile, and Contentment and Beauty Flame, who were first and second in the Group 1 Queen’s Silver Jubilee Cup at seven furlongs on turf at Sha Tin in February.