Novak Djokovic reaches 3rd round

— -- MELBOURNE, Australia -- Novak Djokovic stayed on track for a fourth consecutive Australian Open singles title with a 6-0, 6-4, 6-4 win Wednesday over Leonardo Mayer of Argentina as temperatures neared 108 degrees.

Advancing to the third round with his 26th consecutive match win, Djokovic had a brief scare while serving at 3-0 in the first set when he turned over on his left ankle, tumbling to the court.

But it wasn't serious enough for him to warrant medical attention during the next break in play, and he took the opening set in just 22 minutes, conceding just eight points.

"It was just I slipped a little bit," Djokovic said. "It was an instant discomfort, but it was OK after."

Djokovic is attempting to win a fifth Australian title. He would be the first man to achieve that feat since the Open era began in 1968.

Third-seeded David Ferrer overcame a slow start to beat Adrian Mannarino of France 7-6 (2), 5-7, 6-0, 6-3 in a second-round match.

Ferrer trailed 3-0 in the opening set before rallying in the tiebreaker, then fell behind 4-1 in the second before taking control in the final two sets.

Mannarino appeared to be more adversely affected by the hot temperatures and had a visit from the tournament doctor in the fourth set.

Ferrer is Djokovic's main threat in the bottom half of the draw, with top-seeded Rafael Nadal, Andy Murray and Roger Federer all playing in the other half.

The Spanish baseliner has lost to Djokovic in the past two Australian Opens, in the semifinals last year and the 2012 quarterfinals.

Seventh-seeded Tomas Berdych was the first man into the third round with a 6-4, 6-1, 6-3 win over Kenny de Schepper of France.

Berdych took advantage of five of his eight break-point opportunities while maintaining a perfect 13-0 record on his serve. He set up his first match point with a deft half-volley at the net, then clinched it on the next when de Schepper hit a forehand long.

The 2010 Wimbledon finalist helped the Czech Republic repeat as Davis Cup champion last year, defeating Serbia 3-2 and going 4-1 in singles and 3-0 in doubles during the year.

In other action, No. 9 Richard Gasquet beat Russian veteran Nikolay Davydenko 7-6 (3), 6-4, 6-4. No. 17 Tommy Robredo, No. 20 Jerzy Janowicz and No. 29 Jeremy Chardy also advanced.

Florian Mayer beat No. 14 Mikhail Youzhny, Uzbekistan's Denis Istomin beat No. 30 Dmitry Tursunov and Bosnian qualifier Damir Dzumhur advanced when No. 32-seeded Ivan Dodig retired with cramps while leading in the fourth set.

Sam Querrey fired 19 aces, saying he had "one of the best service days of my life" in a 6-2, 6-3, 6-4 upset win over No. 23 Ernests Gulbis.

The Associated Press contributed to this report.