The USPA Junior Open is an annual polo tournament held in the United States for junior (under 21 years of age) players. The tournament is organized by the United States Polo Association (USPA), the national governing body for the sport of polo in the United States. The USPA Junior Open is considered one of the top tournaments for junior polo players in the United States, and it attracts top talent from around the country. The tournament is typically held in the summer and features teams competing for the championship title. The USPA Junior Open is known for its high-level competition and exciting matches, and it is an important event on the junior polo calendar.