The Kremlin Cup is an annual professional tennis tournament held in Moscow, Russia. It is part of the ATP Tour and WTA Tour, featuring both men's and women's competitions. The event typically takes place in October and is played on indoor hard courts, attracting top players from around the world. Established in 1990, the Kremlin Cup has grown in prestige and popularity over the years. It is known for its vibrant atmosphere and has been a key event in the tennis calendar, contributing to the development of the sport in Russia and showcasing local talent alongside international stars.