Tecnifibre, headquartered in Paris, France, is a sports equipment company, specializing in equipment for tennis and squash. Tecnifibre was founded in 1979 and has been recognized as one of the leading producers of premium tennis strings.
The Citi Open is a joint professional tennis tournament played on outdoor hard courts, and held annually in late July at the William H.G. FitzGerald Tennis Center in Rock Creek Park, Washington, D.C., United States. The Citi Open is part of the ATP World Tour 500 series on the Association of Tennis Professionals World Tour, and of the WTA International tournaments on the Women's Tennis Association Tour.