Novak Djokovic continued his fantastic start to the 2011 ATP World Tour season. The world no.2 remains unbeaten in 31 successive matches after coming back from a set and a break down to defeat Brazil’s Thomaz Bellucci 4-6, 6-4, 6-1 in 2 hours and 9 minutes on Saturday in the semi-finals of the Mutua Madrid Open.