Defending champion Novak Djokovic defeated third seed Roger Federer 6-1, 6-2, 3-6, 6-3 to reach the men's final of Australian Open Tennis today.Djokovic won the first two sets comfortably but Federer came back strongly in the third. However, Federer ran out of steam in the fourth set.Djokovic will face the winner of the second semifinal between Andy Murray and Milos Raonic in the title clash on Sunday.In the Wome's Singles final, world number one and defending champion Serena Williams will meet Angelique Kerber.Serena today stormed into the final of, the first Grand Slam of the season, defeating fourth seed Agnieszka Radwanska of Poland, in straight sets, 6-0, 6-4. Serena is now just one step away to win her seventh Australian Open and 22nd Grand Slam title. In the other semifinal today, German Angelique Kerber defeated Johanna Konta of Great Bitain 7-5, 6-2. India's Sania Mirza and her team-mate Ivan Dodig entered semi-finals of Australian Open Mixed Doubles defeating Indo-Swiss pair of Leander Paes and Martina Hingis 7-6, 6-3.