Besides, what surface is St Petersburg tennis?
Just so, are there any tennis tournaments in Russia?
The Kremlin Cup (Russian: Кубок Кремля) is a professional tennis tournament played on indoor hard courts. It is currently part of the ATP Tour 250 series of the ATP Tour and is a Premier Tournament on the WTA Tour. It was held annually at the Olympic Stadium in Moscow, Russia, from 1990 to 2018.