Five-time Grand Slam champion Maria Sharapova beat 14th seed Anastasija Sevastova in straight sets to reach the third round of the Australian Open.

The Russian, beaten in three sets by the Latvian at the US Open last year, won 6-1 7-6 (7-4) in one hour and 20 minutes.

Sharapova, 30, was broken when serving for the match at 5-4, but recovered to win the tie-break on Rod Laver Arena.

“I’m happy to get through on a day like this,” the 2008 champion said.

“When she broke back I thought: ‘Oh, it’s going to be three sets again’.”

• Konta knocked out by world number 123 Pera
• Muguruza stunned by Su-Wei
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Sharapova will next face Germany’s 2016 Australian Open winner Angelique Kerber, who celebrated her 30th birthday by overcoming Croatia’s Donna Vekic 6-4 6-1.

Sixth seed Karolina Pliskova stormed past Brazil’s Beatriz Haddad Maia, winning 6-1 6-1 in 44 minutes, and next will play fellow Czech Lucie Safarova, who beat Romanian Sorana Cirstea 6-2 6-4.

Madison Keys sailed through against Russia’s Ekaterina Alexandrova even faster, with the American 17th seed winning 6-0 6-1 in 41 minutes.

Croatia’s Mirjana Lucic-Baroni, the 28th seed and 2017 semi-finalist, was defeated 6-3 6-1 by Aliaksandra Sasnovich.

The Belarusian will play Caroline Garcia in the third round after the French eighth seed prevailed 6-7 (3-7) 6-2 8-6 over Czech Marketa Vondrousova.

Elena Vesnina became the 10th of the top 16 women’s seeds to go out by the second round, losing 7-6 (7-4) 6-2 to Japanese 20-year-old Naomi Osaka.

Poland’s Agnieszka Radwanska, a semi-finalist twice in the past four tournaments at Melbourne, needed three sets to see off Ukraine’s Lesia Tsurenko as she won 2-6 7-5 6-3.

Radwanska, the 26th seed, will play Taiwanese Hsieh Su-Wei next after the world number 88 shocked Wimbledon champion Garbine Muguruza 7-6 (7-1) 6-4.

British number one Johanna Konta suffered a shock defeat by world number 123 Bernarda Pera in the second round of the Australian Open.

The American won 6-4 7-5 to claim only her second win at Grand Slam level.

Ninth seed Konta had reached the quarter-finals and semi-finals on her past two visits to Melbourne Park.

She saved four match points on a hot and blustery afternoon but framed a smash on the fifth to give 23-year-old Pera the biggest win of her career.

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Pera goes on to face Barbora Strycova in the third round after the Czech 20th seed beat Spain’s Lara Arruabarrena 6-3 6-4.

Konta, 26, has now won just three of 11 matches since reaching the Wimbledon semi-finals in July.

Pera lost in qualifying and only made it into the main draw of a Slam for the first time as a lucky loser, after another player withdrew through injury.

The Croatia-born American has taken full advantage, deservedly knocking out ninth seed Konta with relentless attacking off her returns and forehand.

“I was ready to leave on Monday,” said Pera. “When I got in I was so excited and to win two rounds is amazing.”

Konta could not cope with the pace and depth coming at her, while her own serve failed to make much impact, and she finished without hitting a single ace.

Despite landing 70% of her first serves, she would end the match having won just 54% of those points, while 14 winners illustrated her struggle to hit through Pera.

An overhead that was completely missed, followed soon after by a mishit smash on match point, summed up the way her game had unravelled.

It was clear from the outset that Pera was going to provide a far sterner test than her ranking suggested, with a break point going begging in the first game.

A “come on!” from Konta just for holding serve at 3-3 told of the pressure that Pera was applying, and two brilliant returns gave the American the only break of the first set.

The conditions were playing their part, with Konta missing successive backhands from mid-court as the wind swirled, but two double-faults in a row suggested the occasion might finally be getting to Pera as she slipped 2-0 behind in the second set.

That theory was debunked within minutes as Pera tore into another Konta service game, breaking straight back after the Briton telegraphed a poor drop shot.

Konta was under huge pressure now, battling well to save five break points before Pera made the seemingly decisive breakthrough at 4-3.

There was a final flash of resistance from Konta.

She staved off three match points and then broke to level at 5-5, but a desperate service game followed and she would end up flat on her back on the baseline as Pera broke for a fourth time.

With her game creaking, Konta’s spirit remained willing at least.

A fourth match point was seen off before Pera finally clinched the win of her life, when the Briton could only frame a smash into the stands on match point number five.

Analysis

British number Naomi Broady on BBC Radio 5 live sports extra

Credit to Pera for outhitting Konta. She was just too good, she served incredibly intelligently, really using the out-wide, swinging lefty serve and if Jo edged over she just aced her up the ‘T’.

It’s the start of the season and I hope it doesn’t knock Jo’s confidence too much. I think the Fed Cup will be next so she can get out there and enjoy the team atmosphere.

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Third seed Grigor Dimitrov was pushed to the limit before scraping past American qualifier Mackenzie McDonald in the Australian Open second round.

The Bulgarian, whose recent form has made him one of the favourites for the title, eventually came through 4-6 6-2 6-4 0-6 8-6.

Dimitrov struggled from the start as world number 186 McDonald played the match of his career.

But he fought back to win in three hours and 25 minutes.

“He deserves a lot of credit. He played an unbelievable game,” said Dimitrov. “I had to fight so much and in the end I think my experience helped me.”

McDonald only recorded his first Tour-level victory in the first round.

Top seed Rafael Nadal earlier progressed to the last 32 with a straight-set victory over Argentina’s Leonardo Mayer.

The Spaniard, 31, beat world number 52 Mayer 6-3 6-4 7-6 (7-4) in two hours 38 minutes on Rod Laver Arena.

Mayer responded to a Nadal break in the final set with one of his own, before the 2009 champion took the tie-break.

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“I’m happy to be in the third round and a second victory in a row is very important news for me,” said Nadal.

“Leonardo is a player with big potential, he hits the ball so strong. He is a very dangerous opponent.

“This tournament is my favourite of the year, so I want to stay here as long as possible.”

Nadal will face Bosnia and Herzegovina’s Damir Dzumhur in the next round after the world number 30 beat John Millman 7-5 3-6 6-4 6-1.