Djokovic, Wawrinka may face off in semis

The Swiss fourth seed upset Djokovic in the quarterfinals on the way to winning his first Grand Slam title in Melbourne last year.

The Serb top seed is scheduled to face big-serving Canadian Milos Raonic in the quarters, while Wawrinka could meet Japanese fifth seed Kei Nishikori in the last eight.

Roger Federer, who is chasing an 18th Grand Slam victory at the age of 33, is on course to face Andy Murray in the quarterfinals in the bottom half of the draw. Murray, a three-time Australian Open runner-up, lost to the Swiss great in the 2010 Melbourne Park final. Federer, who will face Taipei’s Lu Yen-Hsun in the opening round, is the second seed. Third seed Rafael Nadal faces a tough first-up opponent in Russian Mikhail Youzhny and could play big-serving Czech Tomas Berdych in the quarters in the bottom half of the draw.

Meanwhile, world number one Serena Williams faces a potential rematch of her US Open final against Caroline Wozniacki in the quarterfinal. Williams, who is chasing her 19th Grand Slam title in Melbourne, beat Wozniacki in straight sets in New York last year. The American meets Belgian Alison van Uytvanck in the first round, while second seed Maria Sharapova first faces a qualifier in the tournament beginning on Monday.

Fourth seed and two-time Wimbledon champion Petra Kvitova, who is playing in the Sydney International final later Friday, is seeded to face Agnieszka Radwanska in the other quarterfinal in the top half of the draw. Sharapova is projected to face rising Canadian Eugenie Bouchard in last eight.