ARLINGTON HEIGHTS, Ill. &ndash; Arlington general manager Tony Petrillo said he hopes a very slow weekend at the entry box is an isolated occurrence and that the pace of Arlington entries will bounce back next week.Arlington carded only seven races each on its Saturday and Sunday cards this weekend. Saturday&rsquo;s program drew a mere 47 entrants, Sunday&rsquo;s 46. Arlington added a fourth day to its race week in July, and with so many Midwest tracks running concurrent meets, there is a general horse shortage in the region. But Petrillo believes Arlington can at least keep its head above water while running four&#45;day weeks through August.&ldquo;This is just one weekend out of the three we&rsquo;ve had four&#45;day weeks,&rdquo; Petrillo said. &ldquo;We have a good chance to have good entries from here on out.&rdquo;Last Saturday, Arlington got 71 entrants in eight races. Last Sunday&rsquo;s card, however, had only 51 entrants in seven races. Arlington has averaged 7.39 starters per race at this meet, down from 7.49 during 2016. ◗ The 2&#45;year&#45;old filly Sistriot has died from injuries sustained in a paddock accident before race 8 on Thursday. Sistriot became agitated, flipped, and then got her foot tangled in the reins. State veterinarian Kent Martin sustained an injury to his eye trying to keep the horse from struggling after she was hurt.◗ Jockeys Carlos Ulloa and Diego Sanchez both will miss several weeks because of injuries sustained in a spill on the far turn of the first race Thursday. Sanchez has a broken clavicle, while Ulloa has a fractured ulna and an injury to his sternum. Ulloa&rsquo;s mount apparently clipped heels, and Sanchez&rsquo;s fell over him.