PHOTO GALLERY: At the Windy City Open squash tournament

CHICAGO (AP) The world's top professional squash players - 66 men and 66 women - from 21 countries competed at the Windy City Open in Chicago through March 1.

The World Series event was held in Cathedral Hall at the University Club of Chicago, a landmark building that opened downtown in 1909 and is known as the nation's first Gothic modern skyscraper. The athletes used rackets to strike a small rubber ball which travels up to 170 miles per hour onto the surface of the four glass walls.

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Online:

For more on the tournament: http://www.windycityopen.com/

For a 360-dgree view of the venue: https://www.facebook.com/APNews/photos/a.10150366988291623.355082.249655421622/10154358735171623/?type=3&theater