ProServ, which has managed Ivan Lendl’s career...

ProServ, which has managed Ivan Lendl’s career since he moved to the United States from Czechoslovakia five years ago, is suing the tennis star for breach of contract.

Lendl broke with the Washington-based management company and has formed his own operation, Spectrum Sports. The complaint, filed in United States District Court for the District of Columbia, is seeking fees and damages from the world’s No. 1 tennis player.