Roger Federer sealed his 300th grand slam victory as the world number three overcame a fight back from Grigor Dmitrov to keep hopes of a fifth Australian Open title alive on day five of the action down under.
Bulgarian Dmitrov played some good tennis and was rewarded by winning the second set to level the match, but Federer’s experience proved vital as he denied the 27th seed an upset to win in four sets 6-4 3-6 6-1 6-4.
The 34-year-old will face Belgian David Goffin in the next round after the 15th seed was made to work for his place in the fourth round overcoming Austria’s Dominic Thiem 6-1 3-6 7-6 (7/2) 7-5 to set up a clash with Federer.
Novak Djokovic marched on in his quest to retain the Australian Open but the Serbian was not at his best to see off Andreas Seppi, but the Italian failed to capitalise as the top seed secured a 6-1 7-5 7-6 (8/6) victory.
Gilles Simon will be the man standing between Djokovic and a place in the quarter-finals after the Frenchman secured his passage into the fourth round with a comfortable 6-3 6-2 6-1 win over Federico Delbonis of Argentina.
Roberto Bautista Agut caused the biggest upset of the round as the Spanaird dumped out former US Open champion Marin Cilic, as he bagged a 6-4 7-6 (7/5) 7-5 straight sets victory over the Croatian.
The Spanish 24th seed will now face Thomas Berdych in the next stage as the sixth seed overcame a fight back from Aussie Nick Kyrgios sealing victory with a break point to win 6-3 6-4 1-6 6-4.
Frenchman Jo-Wilfried Tsonga needed two tie-breaks to overcome his spirited compatriot Pierre-Hugues Herbert as the ninth seed secured a 6-4 7-6 (9/7) 7-6 (7/4) straight sets win to advance.
Japan’s Kei Nishikori set up a fourth round date with Tsonga as the seventh seed saw off the challenge of Spain’s Guillermo Garcia-Lopez in four sets 7-5 2-6 6-3 6-4.
In women’s action, Serena Williams hopes of a seventh Australian Open title got a step closer as the American crushed Russian teenager Daria Kasatkina 6-1 6-1 to ease into the fourth round.
Russian Maragarita Gasparyan is next on Williams’ hit-list as the 21-year-old booked a fate with the 21-time time grand slam winner with a 6-3 6-4 win over Yulia Putinseva of Kazakhstan.
2008 Aussie Open winner Maria Sharapova was made to work for her place in the next round, as she overcame a spirited second set challenge from American Lauren Davis to eventually walk out with a comfortable 6-1 6-7 (5/7) 6-0 win.
Swiss player Belinda Bencic had to come from a set down to book her spot in the next round and set up a clash with Sharapova after a hard-fought 4-6 6-2 6-4 victory over Kateryna Bondarenko of Ukraine
Agnieszka Radwanska overcame a leg injury to secure her passage through with the fourth seed securing a 6-4 6-0 straight sets win over Puerto Rico’s Monica Puig.
German Anna-Lena Friedsam will face Poland’s Radwanska in the fourth round as she knocked out Wimbledon semi-finalist Roberta Vinci coming from a set down to beat the Italian 0-6 6-4 6-4.
Petra Kvitova’s conqueror Daria Gavrilova kept her Aussie Open dream alive with a narrow 4-6 6-4 11-9 win over France’s Kristina Maladenovic and will now face Spain’s Carla Suarez Navarro, as the tenth seed’s Russian opponent Elizaveta Kulichkova retired while trailing 6-4 2-0.