Imagine seeing Andre Agassi face off against John McEnroe. Or catching Lindsay Davenport one day and Serena Williams the next. You can see these tennis stars in action this month during the GEICO-sponsored 37th season of World TeamTennis (WTT), a unique coed professional tennis league co-founded by Billie Jean King in the early 1970s.

The league drafts the legends, current touring players (like the Williams sisters) and rising tennis stars onto teams representing cities across the country. Cheer on your all-time tennis favorites as they smash for the Washington Kastles, Sacramento Capitals and more.

This season runs July 9 to 28 with the finals in September. Don't miss these marquee matches:

• Watch former World No. 1 Lindsay Davenport and the Orange County Breakers kick off the season in Irvine, Calif., on July 9.

• On July 19, Andre Agassi's Boston Lobsters play against the New York Sportimes on Randall's Island, N.Y., and will feature Martina Hingis and John McEnroe.

• In Washington, D.C., on July 22, watch 27-time Grand Slam champion Serena Williams lead the defending WTT-champion Washington Kastles against the Kansas City Explorers.

For more information and to buy tickets, visit wtt.com.