Roger Federer breathed a sigh of relief after surviving an early deficit and an injury scare to reach the third round of the Australian Open.
Federer lost the opening set of his second-round match to Italy's Simone Bolelli before calling the trainer to Rod Laver Arena for what initially appeared to be a blister on the little finger of his right hand.
The Swiss star looked decidedly uncomfortable and ushered away a nearby television cameraman - "Do you need to be so close?" - but recovered his composure to eventually secure a 3-6 6-3 6-2 6-2 victory.
"I thought Simone played really well in the first set, so I really had to fight until the middle of the third set and once I got the break I was able to relax a little bit, but it was tough and I'm really pleased to come through," said Federer, who will face Italy's Andreas Seppi in the last 32.
Meanwhile, Andy Murray was delighted to spend as little time on court as possible on the hottest day of the Open so far.
Murray took just an hour and 42 minutes to beat Australia's Marinko Matosevic 6-1 6-3 6-2 on Margaret Court Arena, where the temperature climbed above 90 degrees.
The 27-year-old Scot will face Portugal's Joao Sousa in the last 32 after Sousa was leading 32nd seed Martin Klizan by two sets to one and 1-0 in the fourth set when Klizan was forced to retire.
Third seed Rafael Nadal overcame illness and an inspired opponent to avoid a shock defeat as he beat world number 112, Tim Smyczek 6-2 3-6 6-7 (2/7) 6-3 7-5.
Nadal sought treatment from the tournament doctor early in the third set and looked physically drained as he failed to serve out the set at 5-4.
Smyczek then raced through the tie-break to take a two sets to one lead, producing a wide variety of winners that left Nadal shaking his head, including several leaping backhands struck with both feet well off the ground.
However, Nadal dug deep to force a decider and raised his game to pile the pressure on Smyczek, who saved break points in the first and seventh games to keep his nose in front.
That pressure finally told as Nadal broke for a 6-5 lead, but there was still time for more drama as a spectator shouted out just as the left-hander was serving at 30-0.
The resulting fault looked set to stand, only for Smyczek to tell the umpire to replay the point.
Nadal won it to claim three match points, but was dragged back to deuce before finally getting over the line to complete a gutsy win in four hours and 12 minutes.
Elsewhere, Bulgaria's Grigor Dimitrov is on course for a fourth-round clash with Andy Murray after victory over Lukas Lacko. Next up is a clash with Marcos Baghdatis, who knocked out 20th seed David Goffin of Belgium.
There were also wins for seventh seed Tomas Berdych, South African Kevin Anderson and France's Richard Gasquet, the latter pair facing each other in the third round.
