Management of the Kiest Tennis Center in Oak Cliff could switch from its current local nonprofit to McKinney-based company Impact Activities. But outspoken support for Dallas Tennis Association prompted City Council to direct staff to go back to the drawing board on who will manage the center. The current contract with Dallas Tennis Association, or DTA, is set to expire at the end of the year. Supporters organized a rally at 8:30 a.m. ahead of Wednesday's City Council meeting.