LOUISVILLE, Ky. &ndash; Back&#45;to&#45;back allowances are the nominal features on the Friday opener, although it&rsquo;s quite possible the horses with the greatest upside are in an earlier race.Untapped, a full sister to 2014 Kentucky Oaks winner Untapable (by Tapit out of Fun House, by Prized), will make her debut in the sixth race, a $43,000 one&#45;mile maiden race that has a number of 2&#45;year&#45;old fillies with attractive pedigrees.Like her champion 5&#45;year&#45;old sister, who was retired in late June with career earnings of nearly $4 million, Untapped was bred by her owner, Winchell Thoroughbreds, and is trained by Steve Asmussen, the newly minted Hall of Famer. The filly shows six workouts at Churchill dating to Aug. 1. She&rsquo;ll be ridden by Florent Geroux as part of a full field of 12 fillies by such top sires as Curlin, Bernardini, Giant&rsquo;s Causeway, and Flatter.The ensuing features are a $47,000 second&#45;level route for older horses (race 8) and a $45,000 first&#45;level race for fillies and mares at seven furlongs (race 9).◗ Ricardo Santana Jr. was named on one mount on the closing&#45;day Thursday card at Kentucky Downs but was going to take off, according to agent Ruben Munoz. Santana won 14 races at the Saratoga meet that ended Sept. 5 and rode for several more days afterward back East.&ldquo;We were very grateful to have had a better meet than most expected,&rdquo; Munoz said. &ldquo;I don&rsquo;t remember the last time a Kentucky rider won that many at Saratoga.&rdquo; Santana, the leading rider in each of the last four years at Oaklawn Park in Arkansas, has mount earnings of more than $6.7 million in 2016, 16th&#45;highest in North American and third only to Geroux ($12.7 million) and Leparoux ($8.1 million) among Kentucky regulars. The 23&#45;year&#45;old native of Panama is named on five mounts on the Friday opener.◗ The Churchill Downs Racing Club is expected to see action this meet with both of their D. Wayne Lukas&#45;trained 2&#45;year&#45;olds. Warrior&rsquo;s Club was to be entered in a maiden race for colts and geldings on opening weekend, while Dial Me, most recently eased in the Aug. 19 Adirondack at Saratoga, was expected to take a pass on the Pocahontas and wait for a first&#45;level allowance.Each horse is owned by a group of 200 that paid $500 each to become participants.◗ Lots of Cardinal red and Seminole garnet&#45;and&#45;gold can be expected on the Churchill grounds for some of the later races Saturday after Florida State and Louisville complete their football game at nearby Papa John&rsquo;s Cardinal Stadium. The game kicks off at noon Eastern, meaning fans will be walking over by about the fourth or fifth race. A ticket stub from the game is good for free admission.◗ Joe Cain, a 2&#45;year&#45;old gelding named for the late trainer, easily won his career debut Sunday night at Mountaineer. Joe Cain was a mainstay of the Kentucky circuit, best known for winning the Grade 2 Vanderbilt at Saratoga in 2003 with Private Horde. He died in March 2013 at age 57 from amyotrophic lateral sclerosis (ALS), also known as Lou Gehrig&rsquo;s disease.