Racetrack preparation for opening day at Arlington International Racecourse.

Bob Chwedyk | Staff Photographer

The new Silks @ 2200 Group venue is ready for opening day at Arlington International Racecourse.

Bob Chwedyk | Staff Photographer

Crews work to get things ready for opening day at Arlington International Racecourse.

Bob Chwedyk | Staff Photographer

Horses take to the track in preparation for opening day at Arlington International Racecourse.

Bob Chwedyk | Staff Photographer

Horses work out in preparation for opening day at Arlington International Racecourse.

Bob Chwedyk | Staff Photographer

Horses take to the track in preparation for opening day at Arlington International Racecourse.

Bob Chwedyk | Staff Photographer

Aide Silva, wife of trainer Carlos Silva, walks with her granddaughter through the grandstand watching horses work out in preparation for opening day at Arlington International Racecourse.

Bob Chwedyk | Staff Photographer

Horses take to the track in preparation for opening day at Arlington International Racecourse.

Bob Chwedyk | Staff Photographer

Horses take to the track in preparation for opening day at Arlington International Racecourse.

Bob Chwedyk | Staff Photographer

Spotter Gina Pantano checks in a horse on its way to the track in preparation for opening day at Arlington International Racecourse.

Bob Chwedyk | Staff Photographer

The new Cowboy Grille, which replaces the Paddock Pub this season is ready to open in preparation for opening day at Arlington International Racecourse.

Bob Chwedyk | Staff Photographer

The new Cowboy Grille, which replaces the Paddock Pub this season, is ready for opening day at Arlington International Racecourse.

Bob Chwedyk | Staff Photographer

Horses take to the track in preparation for opening day at Arlington International Racecourse.

Bob Chwedyk | Staff Photographer

Horses take to the track in preparation for opening day at Arlington International Racecourse.

Bob Chwedyk | Staff Photographer

Horse owner Mary Zimmerman, of Barrington, watches her horse work out in preparation for opening day at Arlington International Racecourse.

Bob Chwedyk | Staff Photographer

Horse owner Theresa Nugent, of Chicago, center, and Michael Campbell, President of the Illinois Thoroughbred Horseman's Association, to Nugent's left, watch with other owners as horses work out in preparation for opening day at Arlington International Racecourse.

Bob Chwedyk | Staff Photographer

Horses work out in preparation for opening day at Arlington International Racecourse.

Bob Chwedyk | Staff Photographer