Won ITF tournaments in Korolev, McAllen, Little Rock, and Phnom Penh and also won the Orange Bowl.
He played in the ITF junior tournament in Ozerov in 1999 when he was 13 years old.
He competed in the 2002 Junior Australian Open.
His brother Dmitri Sitak also became a professional tennis player.
His pro debut came at a challenger tournament in Togliatti, Russia, but he lost in the first round to James Blake's brother Thomas.