Russian Tennis Federation President Shamil Tarpischev has been fined $25,000 by the WTA Tour and suspended from tour involvement for a year for questioning Venus and Serena Williams' gender in comments on Russian television. The WTA Tour said Friday that the $25,000 fine is the maximum allowed under tour rules and that it is seeking Tarpischev's removal as chairman of the Kremlin Cup tournament for one year. The tour also said Tarpischev owes Venus and Serena Williams a personal apology. "The statements made by Shamil Tarpischev on Russian television with respect to two of the greatest athletes in the history of women's tennis are insulting, demeaning and have absolutely no place in our sport,'' WTA Tour chairman and CEO Stacey Allaster said in a statement. Dave Haggerty, the president and chairman of the U.S. Tennis Association, also called on Tarpischev to issue a formal apology to the sisters. "As the president of the Russian Tennis Federation and a member of the International Olympic Committee, Mr. Tarpischev is expected to conduct himself with the highest degree of integrity and sportsmanship,'' Haggerty said in a statement. "Unfortunately, his comments do not embody either of these traits and in fact were reprehensible.''