Murray and Wawrinka through, Isner blows Lopez away
Andy Murray reached the fourth round of the Australian Open by beating Joao Sousa, although the victory was overshadowed as his father-in-law, Nigel Sears, collapsed while the match was taking place.
Sears was taken to hospital after collapsing in the stands during the match between Ana Ivanovic, who the 58-year-old Englishman coaches, and Madison Keys on Rod Laver Arena.
Second seed Murray was unaware of what had taken place as he beat Sousa 6-2 3-6 6-2 6-2 and thankfully there was positive news that Sears was "conscious, talking and sitting up" after undergoing tests.
A 400th tour-level win saw Stan Wawrinka - who was hampered by a cold - through to the second week, with Lukas Rosol beaten 6-2, 6-3, 7-6 (7-3), while John Isner put on a devastating display of serving to see off Feliciano Lopez.
Murray maintained his 100 per cent record over Sousa, but the world number two failed to hit the heights that he reached in a second-round win over Sam Groth.
The Brit lost the second set, but then took charge to seal his place in the last 16 after coming up with 41 winners and breaking six times.
Wawrinka, the 2014 champion, came through his third-round encounter in straight sets, while Bernard Tomic came out on top in an all-Australian final match of the day against John Millman.
SEEDS SAYING GOODBYE
There were no shocks on Saturday, with Lopez (18) the highest-seeded player to make an exit when he failed to cope with a barrage of aces from big-serving American Isner.
Isner has not lost a service game in the tournament and blasted down 44 aces to take his tally from his first three matches to 101 following his triumph over Lopez.
Gael Monfils reached the fourth round for the first time in seven years by claiming his 350th Tour-level at the expense of fellow Frenchman Stephane Robert.
SOCIAL MEDIA SWEEP
Isner delivered a simple reaction to his third-round victory, posting: "Keep Pounding."
Lopez was gracious in defeat, tweeting: "Congrats @JohnIsner for your victory! Let's focus on doubles!"
THEY SAID WHAT?
Wawrinka was on top form in his on-court interview after sealing victory, saying: "Now I can talk. Last few days I couldn't really talk. I've been okay, maybe too many cigars!
"I had a bit of a cold, I'm feeling better and as long as I'm moving well and feeling good on the court that's the most important. I don't really need my voice so if I can talk, I talk too much s*** so it's better..."
Murray said. "I didn't feel great. You know, the match against Groth, though I returned well, I didn't get to hit that many groundstrokes. I didn't feel I was in a great rhythm, wasn't hitting the ball clean at the start."
Murray silenced a partisan home crowd when he inspired Great Britain to Davis Cup victory over Belgium and will have to do the same when he takes on Tomic.
Wawrinka will be up against Milos Raonic, who beat him in an Abu Dhabi exhibition contest at the start of the season. Eighth seed David Ferrer comes up against Isner.
Andy Murray (2) beat Joao Sousa (32) 6-2 3-6 6-2 6-2
Stan Wawrinka (4) beat Lukas Rosol 6-2 6-3 7-6 (7-3)
David Ferrer (8) beat Steve Johnson 6-1 6-4 6-4
John Isner (10) beat Feliciano Lopez (18) 6-7 (8-10) 7-6 (7-5) 6-2 6-4
Milos Raonic (13) beat Viktor Troicki (21) 6-2 6-3 6-4
Bernard Tomic (16) beat John Millman 6-4 7-6 (7-4) 6-2
Gael Monfils (23) beat Stephane Robert 7-5 6-3 6-2
Andrey Kuznetsov beat Dudi Sela 7-5 3-6 6-1 7-6 (7-4)