There are how many grand slam tournaments ?
Beijing , China – Beijing Grand Slam , 6-11 June , 2011 Rome , Italy – 2011 Beach Volleyball World Championships , 13-19 June , 2011 Stavanger , Norway – ConocoPhillips Grand Slam , June 27 - July 3 , 2011 Gstaad , Switzerland – 1 to 1 Energy Grand Slam , 4-10 July , 2011 Moscow , Russia – Grand Slam Moscow , 11-17 July , 2011 Stare Jabłonki , Poland – Mazury Orlen Grand Slam , 25-31 July , 2010 Klagenfurt , Austria – A1 presented by Volksbank , August 1-7 , 2011