New Delhi, Dec 09 (ANI): Roger Federer will be returning to Brisbane International in January to start his 2015 season and warm up for the year's first Grand Slam at the Australian Open. The 17-times grand slam champion hopes the beginning of the year to be interesting and aspires to be in tip top shape for next year's tennis season. World No.1 Novak Djokovic, No.2 Roger Federer, No.3 Rafael Nadal along with 2013 Wimbledon champion Andy Murray comprise the so-called 'Big 4' of modern day tennis. Replying to questions on his admiration for tennis legend Pete Sampras, Switzerland's star player said that he will always derive motivation from him and will always be an inspiration for his career. Meanwhile, Serbian Novak Djokovic shared his views over unpredictability in sports and said that it was difficult to name a few favourites for the Grand Slam title.