Dr.Berry and Denneroll inventor, Dr. Adrian Dennewald playing their traditional tennis match at the Conventions resort in Lake Geneva, Wisconsin .

Dr.Berry and Denneroll inventor, Dr. Adrian Dennewald playing their traditional tennis match at the Conventions resort in Lake Geneva, Wisconsin .

Dr.Berry and Denneroll inventor, Dr. Adrian Dennewald playing their traditional tennis match at the Conventions resort in Lake Geneva, Wisconsin .