Suffolk Downs will expand to a four-day race week beginning Monday. Live racing will be conducted on a Monday-Tuesday-Wednesday-Saturday schedule. First post time is 12:45 p.m.uThis past Monday, at Suffolk, jockey Jacqueline Davis rode three winners on Monday’s nine-race card.Davis began her hat trick in the second race with a 41/2-length score aboard Bill’s Jewell ($4.40) for Elizabeth Lezell. In the sixth race, she wore the colors of Glenridge Stable and guided Catreign ($11.60) to a two-length victory. She teamed up with Tom McCooey, Jr. for his second win of the day in the ninth and final race with Jane ($3.60).uA field of 10 Massachusetts-bred fillies and mares are scheduled to go to post in today’s $50,000 Isadorable Stakes to be contested at six furlongs over the main track.New England’s reigning juvenile filly champion, Sociano’s Legacy, will break from post position six for trainer George Brown as part of a coupled entry with stablemate, Sociano’s Treasure. Jacqueline Davis has the call on both daughters of Massachusetts’ stallion Sociano. Last year, Sociano’s Legacy earned the first stakes victory of her career in the $50,000 Norman Hall Stakes.Southoftheborder, runner up in the last three installments of the Isadorable, will break from the outside post for her second start of the year. The Lloyd Lockhart homebred was last seen finishing fourth against male rivals in the $50,000 Rise Jim Stakes on July 16.The eight-year-old mare will be ridden by Jorge Vargas.The Isadorable Stakes is the seventh-race of the nine-race card. Post time 12:45.uGoing into today’s nine-race card, journeyman rider Jorge Vargas is one victory away from the 3,000 win milestone.Vargas, 53, is named aboard seven mounts on the program and will ride Southoftheborder in the Isadorable Stakes.uA pair of graded stakes races highlight Saturday’s 11?race program at Saratoga.In the $500,000 Diana Stakes (G1), a field of 10 fillies and mares will take to the turf in the mile and an eighth contest.Installed as the 3-1 morning line favorite is Aruna, a four-year-old daughter of Mr. Greeley trained by Graham Motion and scheduled to be ridden by Ramon Dominguez. Aruna exits a victory in the All Along Stakes (G3) at Colonial Downs.Sophomores will take center stage in the $500,000 Jim Dandy (G2), a key prep race for the Travers Stakes (G1) on August 27.Headlining the field is Stay Thirsty, the morning line favorite at 5-2 for Todd Pletcher. JJ Castellano remains aboard the three-year-old son of Bernardini after a runner-up finish in the Belmont Stakes (G1).The Diana and Jim Dandy are the ninth and 10th races on the card.Material gathered from wire services and racing sources.