New York, NY (July 5, 2001) -  The World Championships of Wrestling announced today that the Estonian National Wrestling Federation will be sending a delegation to the World Championships in New York this September.  Three athletes will be competing in the men's freestyle competition and six athletes will compete in the men's Greco-Roman competition from the Estonian Delegation.      Responses from each international federation must be returned to USA Wrestling by July 25, 2001 in order to secure a country delegation in the World Championships. Final team rosters must be submitted by each international delegation by August 25, 2001.      More than 600 athletes from 50 countries are expected to compete in the event. This marks the first time all three wrestling disciplines (Greco-Roman, men's freestyle and women's freestyle) will be held together in the United States, making this event the largest World Championships of Wrestling event ever held.    The World Championships of Wrestling will take place at Madison Square Garden, September 26-29, 2001. Tickets for the World Championships are on sale now, with single session ticket prices starting as low as $10.  All-session passes are priced as low as $99 for the eight total sessions, with family packages starting as low at $308.  Individual session tickets can be purchased through TicketMaster by calling 1-212-307-7171.  All-session passes, group ticket packages, VIP Gold Passes and family passes can be purchased by calling 1-866-NYC-2001.