Novak Djokovic continued his remarkable progress at the Australian Open with a straight-sets win over Denis Istomin.
The Serb, who has won the previous three titles in Melbourne, won 6-3 6-3 7-5 and plays Fabio Fognini in round 4.
Serena Williams won a tournament-record 61st singles match by beating Daniela Hantuchova 6-3 6-3 in round 3.
Ana Ivanovic, who beat Australia's Sam Stosur 6-7 (8-10) 6-4 6-2, is next for front runner Williams, while China's Li Na beat Lucie Safarova 1-6 7-6 (7-2) 6-3.
Third seed David Ferrer beat 29th seed Jeremy Chardy in straight sets and 15th-ranked Fognini saw off the obstacle of Sam Querrey 7-5 6-4 6-4.
Spain's Tommy Robredo, the number 17 seed, beat France's ninth seed Richard Gasquet 2-6 7-5 6-4 7-6 (8-6).
The conditions continued to be a concern for gamers, with the temperature level reaching a high of 41.4 C a day after matches were suspended on Thursday since of 43.3 C heat,
Rod Laver Arena
S Williams (US) [1] beat Hantuchova (Svk) [31] 6-3 6-3
Five-time champ Williams was not at her finest and appeared to be dealing with the heat, though she still proved too strong for Hantuchova.
The world primary raced into a 5-3 lead however had to save 2 break points to hold serve before clinching the very first set.
Williams, who has yet to drop an embeded in the tournament, broke early in the 2nd however her opponent was in battling state of mind and reacted to level at 3-3.
Hantuchova's hopes were short-lived, however, as Williams took the effort in the Slovakian's next service video game and served out for the success, sealing it with a powerful forehand winner on her 4th match point.
"It was a hard match," stated Williams. "Daniela is a great opponent so I'm truly happy to come out with the win. It was hot however you need to play, you need to be ready and prepare yourself mentally. I'm delighted to get through."
Serena and sister Venus Williams later withdrew from the doubles soon before their first-round match since of an injury to Venus's left leg.
Ferrer (Spa) (3] beat Chardy (Fra) [29] 6-2 7-6 (7-5) 6-2
Ferrer reached the 4th round of a Grand Slam for the 15th consecutive time as he alleviated past Chardy.
After the Spaniard won the opening embeded in uncomplicated fashion, Chardy installed a stronger difficulty in the second but was not able to convert any of his 5 set points, allowing Ferrer to take it on a tie-break.
That showed the decisive minute in the match, as Ferrer completed the success to establish a meeting with Germany's Florian Mayer for a location in the quarter-finals.
"The secret was when I won the second set," Ferrer stated. "At 4-3 in the second set I made a lot of errors. I had set points down and after winning the second set I played more unwinded. Maybe it was my best match this week."
Dellacqua (Aus) beat Zheng (Chn) 6-2 6-4
Ivanovic (Ser) [14] beat Stosur (Aus) [17] 6-7 (8-10) 6-4 6-2
Home preferred Stosur edged a thrilling initially set after rain stopped have fun with when she was 8-7 up in the tie-break.
Former world number one Ivanovic, 26, broke serve when in the 2nd set and twice in the decider as she concluded triumph with a simple volley into an open court.
"It was a match of the greatest quality. She is a really hard challenger and I simply hung in there," said Ivanovic, who reached the Australian Open last in 2008.
"Winning in Auckland gave me a great deal of confidence and I'm anticipating the difficulty of playing Serena."
Djokovic (Ser) [2] beat Istomin (Uzb) 6-3 6-3 7-5
Four-time champion Djokovic relieved safely into round four with a straightforward victory over Uzbekistan's Istomin.
The Serb, whose last defeat in this competition came in the 2010 quarter-finals, broke in the 3rd and ninth games to finish up the very first set and another break proved decisive in the 4th video game of the 2nd set.
Djokovic looked set to clinch success without dropping his serve, however while serving for the match at 5-4 up in the third set, he double-faulted and struck a backhand into the net to give Istomin a lifeline.
However, the second seed instantly broke back and made no mistake second time around in serving out the match.
"I needed to have really quick footwork and a precise first service, as high a percentage as possible, utilizing every chance to take control over the rally," he said. "I have actually done really well."
Hisense Arena
Li (Chn) [4] beat Safarova (Cze) [26] 1-6 7-6 (7-2) 6-3
Fourth seed Li, runner-up in 2011 and 2013, made it through a Safarova match point as she narrowly prevented ending up being the highest-ranked casualty of the very first week in a contest lasting 2 hours and 37 minutes.
Safarova, who has never beaten a top-10 opponent in a WTA Tour event, served for success in the ninth game of the second set and held a match point in the 12th but Li hung on before dominating the tie-break to force a decider.
The 3rd set was delicately poised until Li broke the Czech in the 8th video game, and Safarova had no response.
Kerber (Ger) [9] beat Riske (US) 6-3 6-4
Berdych (Cze) [7] beat Dzumhur (Bih) 6-4 6-2 6-2
Robredo (Spa) [17] beat Gasquet (Fra) [9] 2-6 7-5 6-4 7-6 (8-6)
Margaret Court Arena
Pennetta (Ita) [28] beat Barthel (Ger) 6-1 7-5
Anderson (SA) [19] beat R-Vasselin (Fra) 3-6 4-6 6-3 7-6 (7-5) 7-5
Fognini (Ita) [15] beat Querrey (US) 7-5 6-4 6-4
Genie's army
Lleyton Hewitt has his 'Fanatics' and Bernie Tomic has 'Tomic's Kittens', however the greatest sound around Melbourne Park on Friday came from an unanticipated love affair in between Australia and Canada.
Genie Bouchard, the rising star and 30th seed, is through to the fourth round of a Grand Slam for the very first time and on course for a quarter-final with Serena Williams.
And the 19-year-old has been vociferously supported throughout by a group of Australian students, 'Genie's Army', who have actually sung a brochure of songs about the Canadian and provided her presents including a toy kangaroo after her first two wins.
"They showed up to my preliminary away on Court 15 with their tee shirts," Bouchard told BBC Sport.
"They're actually into it and helpful and it's terrific to see I have 'incredibly fans' in Australia. They create a huge atmosphere on the court and it's fun to play when they exist."
Quotes of the day
"I inform you this: I'm not geared up to address that question. I'm going to leave it alone." Serena Williams is requested her thoughts on the competition doctor's idea that male "evolved on the high plains of Africa chasing after antelope".
"Serena is on top of the game for so long now. You know, she's somebody we appreciate. I look forward to that challenge. I've been playing some excellent tennis and it's going to be nice test to see where I'm at." Ana Ivanovic is buoyant ahead of her fourth-round match with the world primary.
"Because I didn't practise much, I was unable to get prepared for the next match. Today I was totally kaput." Poland's Jerzy Janowicz produces his finest German to sum up a day in which he lost in straight sets to Florian Mayer while playing in sunglasses.
"I believe 5 centimetres conserved my competition. If she hit it in, my entire team was on the way to the airport." Li Na on how Lucie Safarova was within a hair of knocking her out on match point.
"I was a little bit ill and also my mind was not working. I just enjoyed the ball and simply struck it. I didn't understand where I hit it.