Roger Federer and Novak Djokovic both enjoyed comfortable wins to reach the third round of the Australian Tennis Open.
Federer beat world number 41 Filip Krajinovic of Serbia 6-1 6-4 6-1 to maintain his bid to match Djokovic's seven Australian Open titles.
Djokovic, the defending champion, dismissed Japanese wildcard Tatsuma Ito 6-1 6-4 6-2 in 95 minutes.
The 32-year-old Serb, chasing a 17th Grand Slam title, faces Japan's Yoshihito Nishioka.
Meanwhile, Serena Williams says she was frustrated by her own form as she overcame Slovenian Tamara Zidansek with a patchy performance to reach the third round.
The 38-year-old American, bidding for a record-equalling 24th Grand Slam title, won 6-2 6-3 in 78 minutes.
[Source: BBC]
