In the Dubai Open Tennis tournament, defending champion Novak Djokovic of Serbia will lock horns with Switzerland's World Number 2 Roger Federer in the final encounter of the Men's Singles event on Saturday. Both Djokovic and Federer won their respective semi-finals matches yesterday to seal a place in the final. Roger Federer stunned unseeded Frenchman Richard Gasquet 6-2, 7-5 while Novak Djokovic defeated Czech, Tomas Berdych 6-7, 6-2, 4-2.