Sunday's 10-race card at Saratoga gets started with a field of six juveniles plus one main-track only entrant in a 1 1/16-mile maiden special weight over the Mellon turf course.
The bay daughter of Uncle Mo is out of the Pulpit broodmare Pachattack who was a stakes winner overseas and a graded stakes winner in North America.
"Uyuni has a much better chance going longer," Ward said. "She has the experience with a race under her belt that will help her."
Uyuni will be piloted by jockey Manny Franco from post 4.
The Spa's leading trainer, Christophe Clement, will look to continue his success when saddling Delaware Destiny on behalf of Stuart Grant's The Elkstone Group.
The bay filly by freshman stallion Exaggerator is out of the graded stakes-winning Smarty Jones broodmare Nikkis Smartypants and was bred in New York by SF Bloodstock. She comes from the same family as dual Grade 1-winner Diamondrella and stakes winner Highest Honors.
Delaware Destiny will break from the far outside under Irad Ortiz, Jr.
In Race 6, an overflow field of juveniles will take to the main track in a six-furlong maiden event.
Hall of Famer Steve Asmussen will debut Phoenix Thoroughbreds' Lady Lilly, a daughter of freshman sire and 2016 Kentucky Derby-winner Nyquist.
Lady Lilly, bred in Kentucky by Mueller Thoroughbred Stable, is out of the three-time stakes-placed Pulpit broodmare Miss Inclined, who is a half-sister to turf graded stakes winner Rush Bay.
Lady Lilly has trained forwardly for Asmussen, arriving at her debut off two bullet works including a five-furlong effort in 59.40 seconds from the gate July 22 on the Saratoga main track. She followed up with a three-furlong breeze in 37.71 on July 29 on the Oklahoma training track.
"We're happy with her and think she'll go well," said Phoenix Thoroughbreds CEO Amer Abdulaziz. "She came in from Cash Asmussen's pre-training operation with some good reports and that's continued since she joined Steve. Her works have been good so while it's best not to be overconfident when running against some other good-looking types in a Saratoga maiden, we think she'll put up a decent showing."
Lady Lilly was purchased for $280,000 from last year's 2019 Keeneland September Yearling Sale.
"She's just a really nicely put together filly and we expected her to be relatively sharp and precocious. Let's hope we're right," Abdulaziz said.
Jockey Joel Rosario will be aboard Lady Lilly from post 6.
Highly regarded freshman stallion Runhappy will be represented by My Alluring Lady, who makes her debut for trainer Danny Gargan and owners Reeves Thoroughbred Racing, R. A. Hill Stable and Corms Racing.
Runhappy, the 2015 Champion Sprinter now standing at Claiborne Farm, captured that year's Grade 1 King's Bishop at Saratoga for owner Jim McIngvale, traveling seven furlongs in a stakes record 1:20.54. A $100,000 bonus will be paid to any offspring of champion sprinter Runhappy who wins an unrestricted maiden race during the 2020 Saratoga summer meet.
A $300,000 acquisition from last year's Fasig-Tipton Saratoga Preferred New York-bred Yearling Sale, My Alluring Lady is out of the Curlin broodmare Charismata.
Gargan said My Alluring Lady has trained well heading into her debut, recording a half-mile breeze in 47.60 seconds on July 25 over the Saratoga main track.
"She's a nice filly," Gargan said. "She's got a lot of talent. She's working well. I think Asmussen's filly is going to be tough, but we ought to make a good account of ourselves."
My Alluring Lady was bred in New York by Billy Terrell and Boyd T. Browning, Jr. and will have Manny Franco aboard from post 5.
Michael J. Ryan's Beautiful Farewell, a bay daughter of freshman sire Frosted trained by Michael Stidham, earned a 57 Beyer when third, defeated 1 ¼-lengths, taking on the boys first out in a 5 ½-furlong maiden sprint at Belmont Park.
"She ran at Belmont against colts first time out and was third," said Stidham. "She's back in against fillies and if she runs well there, we could be looking at trying her in a stake at some point. She seems like she has a decent future."
Trainer Chad Brown will saddle Peter Brant's Mo Dean - a $575,000 purchase from last year's Keeneland September Yearling Sale.
The bay daughter of Uncle Mo is out of the Malibu Moon broodmare Don'tforgetaboutme, who is a half to graded stakes winners Mo Tom and Red Ruby as well as multiple Grade 1-placed Beautician.
Jockey Irad Ortiz, Jr. will pilot Mo Dean from post 4.