what are the washington kastles
Washington Kastles. The Washington Kastles is one of six franchises currently competing in World Team Tennis. Based in Washington, D.C. since 2008, the Kastles won the WTT championship in the 2009, 2011, 2012, 2013, 2014 and 2015 seasons. The team is named for Kastle Systems, the office security company owned by team owner Mark Ein.