Four juveniles worked an eighth-mile in less than 10 seconds during Fasig-Tipton's Monday under-tack preview for the March 3 Florida select 2-year-old auction.\r\nHip No. 49, a filly by 2010 leading juvenile sire More Than Ready, had the fastest work over an eighth-mile, 9.6 seconds. The dark bay or brown filly is out of the unraced Unbridled's Song mare Spring Unbridled. She's consigned by W. D. North Thoroughbreds, represented by Steve Venosa's SGV Thoroughbreds agency. She is from the immediate family of Group 3-placed stakes-winner Kid Mambo.\r\nTwo other juveniles shaded 10 seconds on the dirt. Both covered an eighth-mile in 9.8 seconds. They were Hip No. 64, a daughter of former leading juvenile sire Tapit, and Hip No. 67, a Hard Spun colt. Both are gray or roan. Hip No. 64 is a full sister to Grade 2 winner tempted to Tapit consigned by Vision Racing and Sales (Stephens Thoroughbreds, agent). Hip No. 67, is from Hard Spun's first crop and is out of the stakes-placed Aptitude mare Princess Patricia. The dam is a half-sister to champion grass mare forever Together. Ciaran Dunne's Wavertree agency is the consignor.\r\nThe day's fastest one-eighth-mile work on the turf, also in 9.8 seconds, was by hip no. 128, a Medaglia d'Oro colt. A dark bay or brown colt, he is out of Bubbling Heights, making him a half-brother to course record-setter and graded winner J'ray.\r\nTwo juveniles posted the preview's fastest quarter-mile time of 21.6 seconds, Hip No. 73 and Hip No. 112. Hip No. 73 is a chestnut filly from champion Stevie Wonderboy's first crop. She is out of stakes-winner Tina Fleet and is a half-sister to stakes-placed See Sami Run. The Casse Sales agency consigned her on behalf of Kelynack Farm.\r\nHip No. 112 is a bay Empire Maker colt is out of Tenpins's full sister Angel Arch. Hoby and Layna Kight, agents, are the consignors.\r\nThe fastest quarter-mile time on turf was 20.8 seconds by Hip No. 23, an English Channel colt out of stakes-winner Reach the Top. The bay colt is a half-brother to graded winner Changing World and stakes-placed Our Exploit. Off the Hook, agent, is the consignor.\r\nThe under-tack show took place at the Palm Meadows training center in Boynton Beach, Fla. The auction will relocate there this year after 25 years at Calder Race Course near Miami. The auction takes place March 3 at 11 a.m. in Fasig-Tipton's temporary auction facility.