Gilles Muller

MELBOURNE - World number one Novak Djokovic is through to the fourth round of the 2015 Australian Open, after beating Spain's Fernando Verdasco 7-6 (10-8), 6-3, 6-4 in the third round on Saturday.

Djokovic safely overcame a nervous start to set up a fourth round clash with Luxembourg's Gilles Muller, who upset John Isner of the United States in straight sets.

SYDNEY - Serbia's Viktor Troicki is through to the final of the Sydney ATP tournament after beating Gilles Muller of Luxembourg 6-2, 6-4 on Friday in just 64 minutes.

In the final, Troicki will face Mikhail Kukushkin of Kazakhstan, who beat Argentine Leonardo Mayer 6-4, 6-4.

SYDNEY - Serbia's Viktor Troicki reached the semi-final of the ATP tournament in Sydney after scoring a win over Italy's Simone Bolelli 6-3, 3-6, 7-5 on Thursday.

Troicki notched the win after two hours and ten minutes of play.

He is next to take on the winner of the match between Bernard Tomic of Australia and Gilles Muller of Luxembourg.