Tennis is a very popular sport in Uzbekistan, especially after Uzbekistan's sovereignty in 1991. Uzbekistan has its own Tennis Federation called the "UTF" (Uzbekistan Tennis Federation), created in 2002. Uzbekistan also hosts an International WTA tennis tournament, the "Tashkent Open", held in Uzbekistan's capital city. This tournament has been held since 1999, and is played on outdoor hard courts. The most notable active players from Uzbekistan are Denis Istomin and Akgul Amanmuradova.