11.   The summer fair circuit is the target of escalating attacks from the major tracks and some leading horsemen.

12.   The two other fixtures on the summer outdoor sculpture circuit are relatively weak.

13.   When he is not running on the European summer circuit, he sometimes takes his children with him when he trains near home.

14.   After a period of treatment, he returned to the circuit this summer.

15.   Both Rafter and Davenport dominated the hardcourt circuit this summer, each winning three tournaments before coming to Flushing Meadows.

16.   Danny Lewis was a longtime vaudeville performer and also played burlesque and the Borscht Belt, the U.S. summer resort hotel circuit in the Catskill Mountains.

17.   The new ball will be used throughout the Tennis Australia summer circuit, including the Australian Open.