Australian Open PHOTOS: Nadal, Federer cruise, Murray overcomes blip

Russia's Maria Sharapova overcame sweltering conditions and a stubborn Karin Knapp of Italy to reach the Australian Open third round on Thursday with a 6-3, 4-6, 10-8 victory.

-PHOTOS: Heat stops play at Australian Open

Sidelined from the latter part of last season with an injury to her right shoulder, the third seeded Sharapova had trouble with her serve and made 12 double faults as Knapp broke six times in temperatures in excess of 41 Celsius (106 Fahrenheit).

The 2008 champion struggled to temper her impulse to blast winners on every shot which resulted in 67 unforced errors.

Sharapova held three match points while serving for victory in the 10th game, only for Knapp to storm back and prolong the Russian's frustration before she sealed the win in three hours, 28 minutes.

She will play 25th seed Alize Cornet of France in the third round.

Andy Murray dug himself out of a hole with an inspired passage of play to fend off French qualifier Vincent Millot 6-2, 6-2, 7-5 and cruise into the third round.

Two sets up and at 1-1 in the third, Wimbledon champion Murray suffered a huge lapse, allowing the 267th-ranked Frenchman to charge out to a 5-1 lead under the lights at Rod Laver Arena.

Briton Murray simply flicked a switch and won 23 consecutive points in a blistering finish to seal the match with a big serve.

The fourth seeded Scot will play Feliciano Lopez for a place in the fourth round.

Rafael Nadal gave the next generation a lesson in Grand Slam tennis by dismantling teenage talent Thanasi Kokkinakis 6-2, 6-4, 6-2 to cruise into the third round.

A junior finalist at MelbournePark and the US Open last year, 17-year-old Kokkinakis underlined his potential by blazing 21 winners against the world number one to the delight of rowdy home fans at Rod Laver Arena.

But the rangy Australian was unable to match the firepower of the super-fit Spaniard, who wrapped up the match with a booming serve in under two hours.

Nadal will next play either 25th seed Gael Monfils or American Jack Sock.

Roger Federer spent as little time as he needed and gave Blaz Kavcic a tennis lesson in recording a 6-2, 6-1, 7-6 victory to advance to the third round on Thursday.

Playing under the closed roof of Hisense Arena due to the extreme heat that had earlier suspended play on the uncovered courts, Federer raced through the first set in 26 minutes with a strong service game and by belting 17 winners.

Federer's sixth ranking - courtesy of a sub-par 2013 - had given the impression of a 32-year-old man whose skills may be diminishing as he enters the twilight of his illustrious career.

That presumption was emphatically rejected when Kavcic held two break points in the fourth game of the second set and had Federer scrambling back and forth in a 23-shot rally only for the Swiss to force a forehand error.

The hard-hitting world number 99 simply stood hands on hips slowly shaking his head as if pondering what to do next.

The Slovenian did manage to break on the next point and thrust his arms skyward in mock triumph, though that only served to fire up Federer who won 13 of the next 16 points to clinch the set in 28 minutes.

The third set was a little closer with Kavcic's serve improving markedly but he could not halt the inevitable as Federer ended the 107-minute lesson when he clinched the tie-break 7-4.

Federer will now meet either 31st seeded Spaniard Fernando Verdasco or Russian Teymuraz Gabashvili in the third round.

Dane Caroline Wozniacki survived a surreal encounter with American Christina McHale to record a 6-0, 1-6, 6-2 victory on Rod Laver Arena on Thursday and move into the Australian Open third round.

The 23-year-old former world number one had raced through the first set in 28 minutes under the closed roof due to extreme heat only for her game to implode as the 21-year-old McHale attacked her forehand and forced her into errors.

Just as easily as Wozniacki had won the first set, McHale won the second set in 31 minutes to send it into a decider before the 10th seed took a short break between sets.

The break appeared to settle her down and her high standard of play returned in the final set as she broke McHale twice to clinch victory in 103 minutes and set up a third round clash with Spain's Garbine Muguruza.