The Kremlin Cup (Кубок Кремля) is a professional tennis tournament played on indoor hard courts. It is currently part of the ATP World Tour 250 series of the ATP Tour and is a Premier Tournament on the WTA Tour. It has been held annually at the Olympic Stadium in Moscow, Russia, since 1990.
The Kremlin Cup was created in 1990 becoming the first international professional tennis tournament to be held in Russia. The tournament started as a men's only event during the first years of its run, before it became a joint event in 1996.
Until 2007, it was held on a carpet surface. It is now held on a RuKortHard surface