Description:Serbia put themselves 2-0 up against Belgium in their Davis Cup World Group Round 1 match in Charleroi on Friday (February 1). Viktor Troicki came back from two sets down to beat David Goffin 1-6 3-6 7-6(5) 6-4 6-4 before Australian Open champion Novak Djokovic rolled over Olivier Rochus (Belgium) 6-3 6-2 6-2. Belgium must win Saturday's doubles match to stay in the tie as their pair Ruben Bemelmans and Steve Darcis face Troicki and Nenad Zimonjic.(0:48)