Seven-time Wimbledon champion Serena Williams produced an impressive display to beat Julia Gorges 6-3 6-4 and move into the fourth round.

The 37-year-old 11th seed did not face a single break point as she dominated her German opponent in a repeat of her win in last year's semi-final at SW19.

Two-time champion Petra Kvitova also easily moved into the last 16, beating Poland's Magda Linette 6-3 6-2.

But Dutch fourth seed Kiki Bertens lost 7-5 6-1 to Barbora Strycova.

Bertens enjoyed her best run at Wimbledon last year, when she lost to Gorges in the quarter-finals.

But after a close first set, the 27-year old struggled on serve against the 33-year-old Strycova, landing only 29% of her first serves, and winning only 33% of points on her second delivery.

Strycova, of the Czech Republic, is into the fourth round for the first time since 2014, where she will play Belgium's Elise Mertens.

Fellow Czech Kvitova, 29, triumphed in 69 minutes on court two to set up a potential meeting with British number one Johanna Konta.

She will face the winner of Konta and American ninth seed Sloane Stephens, who play later on Saturday.

'Serena's movement is back'

Williams, who will partner Andy Murray in the mixed doubles later on Saturday, took only three minutes longer to end Gorges' resistance and never looked in any trouble.

A big part of her success was down to the consistency of her first serve - Williams got 71% in and won 76% of those points - but she was also able to hurt Gorges with her play from the back of the court.

"Her movement is back, and that was a real statement match by Serena," said BBC commentator Tracy Austin.

"She elevated her game from rounds one and two - she has played so few matches this year, which is why she was so rusty in the earlier rounds."

Williams, who has reached this stage at the All England Club 16 times, will play Spanish 30th seed Carla Suarez Navarro next.

Roger Federer and Rafael Nadal reached the fourth round at Wimbledon with straight-set victories over French opponents.

Spanish world number two Nadal - a two-time winner at SW19 - defeated Jo-Wilfried Tsonga 6-2 6-3 6-2.

Eight-time Wimbledon champion Federer beat Lucas Pouille 7-5 6-2 7-6 (7-4).

Nadal will play Britain's Dan Evans or Portugal's Joao Sousa in the next round while Federer will take on Italy's Matteo Berrettini.

It was the first time Nadal had played Tsonga at the All England Club and their first meeting since 2015.

"I'm very happy. I think I played a great match," Nadal told BBC Sport.

"I was returning well, playing aggressively with the forehand and the backhand. I think I did a lot of things well.

"Tsonga is someone you don't want to face in the third round at Wimbledon.

"Every single day is a battle here. It is not a surface I play a lot of matches on during the year."

Victory over Pouille saw Federer become the first player to achieve 350 Grand Slam singles match wins.

"It was tough. It was a hard-fought match, especially in the first set," Federer said.

"I think going up two sets was key. The third was tough, it was very even.

"There is always a relief winning a third-set breaker because if it goes the wrong way, you might be here for a few more hours."

Nadal in stylish victory

In his first meeting with Frenchman Tsonga at a Grand Slam in 11 years, Nadal secured an early break to move 4-1 ahead and made just three unforced errors throughout the opening set.

The second set stayed with serve until Nadal broke to lead 4-2, and he almost sealed the set on a break before Tsonga fought back to force him to serve out for a 2-0 advantage.

Nadal dominated the third set, gaining a double break, and he almost broke Tsonga yet again on his third match point but the two-time Wimbledon semi-finalist was able to hold.

However, Nadal quickly served out the match to love in one hour 48 minutes, with Tsonga seemingly nursing a hand injury after a tumble earlier in the game.

Federer made to sweat by Pouille

Federer was meeting Pouille for the first time at a Grand Slam and the first set proved a cagey affair, staying on serve with the Frenchman scuppering two break points.

But it was Federer who finally broke serve and he did it at the perfect time, sealing the opening set on his second set point.

The second set proved the polar opposite, however, with Federer sealing a double break early on to go 4-0 up before failing to hold his own serve.

Just as he did in the opener, he won the set on a break to move just one away from a place in the fourth round.

Little could separate the two in the third set with Federer missing match point as Pouille held to take the set to a tie-break, which Federer won.

Elsewhere, eighth seed Kei Nishikori beat American Steve Johnson 6-4 6-3 6-2.

Tennys Sandgren defeated Fabio Fognini 6-3 7-6 (14-12) 6-3 and will play American compatriot Sam Querrey next after he beat John Millman in straight sets.

Italian Fabio Fognini apologised after being heard to say: "I wish a bomb would explode on this club" during his Wimbledon defeat by Tennys Sandgren.

Fognini was already under threat of a ban from two major tournaments for using misogynistic language to a female umpire at the US Open in 2017.

He lost 4-6 6-7 (12-14) 3-6 to American Sandgren in the third round.

"Something happened on court. If somebody feels offended, I say sorry. No problem," said the 32-year-old.

"Most of the time when you're on court, you're frustrated. For sure I was not happy about my performance today because I was knowing I have a lot to win in this case, because I think I have a good chance to win."

Fognini was fined a then record $27,500 (£21,600) at Wimbledon in 2014 for a series of offences during a first-round match.

After the US Open in 2017, he was given a suspended ban of two grand slam tournaments covering two years as well as a fine of more then £70,000, half of which was suspended.

Wimbledon must now decide how severely to punish Fognini for this latest act.

The world number 10 also took a medical time-out for treatment to a bloodied hand after punching his racket to the court in frustration.

Sandgren is through to the fourth round at Wimbledon for the first time and will face fellow American Sam Querrey on Monday.

Wimbledon was hit by a bomb during World World II that damaged the Centre Court roof.

Andy Murray saw one of his bids for Wimbledon silverware prove fruitless as the Briton and France's Pierre-Hugues Herbert lost in the men's doubles.

Murray and Herbert were beaten 6-7 (4-7) 6-4 6-2 6-3 by Croatian sixth seeds Nikola Mektic and Franko Skugor.

All is not lost for the Scot, however, as he has another chance alongside American great Serena Williams in the mixed doubles.

The illustrious pair face Andreas Mies and Alexa Guarachi later on Saturday.

Murray and Williams, two of the sport's most recognisable players, will meet their German-Chilean opponents on a court to be decided after 17:30 BST.

Regardless of what happens in that match, Murray's overriding emotion of returning to Wimbledon - six months after he had a hip resurfacing operation - will be happiness at being competitive.

The 32-year-old Scot made a triumphant return when he and Herbert earned a comeback win over Romania's Marius Copil and France's Ugo Humbert, recovering from a slow start to enthral a boisterous Court One on Thursday by winning in four sets.

But this time the mood on a packed court two, one of the smaller show courts at the All England Club, faltered as Murray and Herbert's second-round match swung in the opposite direction.

The partnership failed to ignite in the same way that Murray's triumphant pairing with Spain's Feliciano Lopez did at Queens, with an almost innate understanding between doubles specialists Mektic and Skugor proving too much.

Initially it looked like it could be another positive outcome for Murray and Herbert, who edged an even first set after a crisp cross-court backhand winner from Murray swung the tie-break in their favour.

But 28-year-old Herbert, who has won all four Grand Slam doubles titles after success with his previous partner Nicolas Mahut, continued to struggle with his returning game in the second set and then crucially saw his serve taken for their opponents to level.

From that point Mektic and Skugor took control as Murray and Herbert's service game waned, the Croatians breaking three more times in the next two sets to reach the third round.

'Doubt we'll see Murray & Herbert in tandem again' - analysis

Peter Fleming, seven-time Grand Slam champion on BBC TV

Mektic and Skugor were good value for their win, after a sluggish start they did play some superb tennis.

We probably won't see a reprise of the Murray-Herbert tandem anytime soon. They just didn't gel.

Andrew Castle, former British number one on BBC TV

I think Herbert will be disappointed with himself more than Murray, who has done more than enough in this grass court season and will be delighted to be back.

Herbert went a little flat in that second set if truth be told.

British number one Johanna Konta staged a determined comeback to beat American ninth seed Sloane Stephens and reach the fourth round at Wimbledon.

The 2017 semi-finalist had trailed by a set and was under pressure on her serve before regrouping to win 3-6 6-4 6-1.

She is the only home hope left in the women's singles after Harriet Dart's 6-1 6-1 loss to top seed Ashleigh Barty.

Dan Evans, the only British man still in the singles, faces Joao Sousa in the third round later on Saturday.

Konta will face Czech two-time champion Petra Kvitova for a place in the quarter-finals on Monday.

"I just kept plugging away more than anything," Konta told BBC television.

"I was fully prepared to not be coming back in that second set because she really was playing well. I was really pleased I could keep battling, I was pleased I could mix things up and I did a good job in getting her out of that zone."

Konta turns frustration into fightback

Last month Konta had dominated Stephens in a 6-1 6-4 victory in the French Open quarter-finals last month, playing some of the best tennis of her career.

But the 28-year-old struggled to find her rhythm and became frustrated with herself at times against the 26-year-old American on Court One.

After losing the first set when she netted a backhand, Konta found herself under increasing pressure on her serve in the second.

She showed glimpses of the mental negativity that has hampered her in the past, shooting glances at her coach Dimitri Zavialoff and berating herself for her wayward shots.

But she then translated that into fighting spirit in the fifth game of the second set when she was taken to deuce six times and saved three break points before eventually holding.

That proved to be the start of a comeback as she went on to break the American in the 10th game to take the set and force a decider.

From then on she did not look back - the overcooked forehands found the lines and the head-shaking at changeovers became fist pumps as she won five games in a row from late in the second set to surge ahead in the third.

And her victory was complete when Stephens hit long with just over two hours on the clock.

Dart learns 'tough lesson'

Dart exits with her head held high after a tournament that marked her first back-to-back wins at tour level.

The world number 182 had said beforehand that the match against French Open champion Barty would provide her with a good measure of where her tennis was at.

Having lost 6-0 6-0 to Maria Sharapova in her last match against a high-profile player on the main show court of a Grand Slam at January's Australian Open, she can be comforted by the fact she got herself on the scoreboard in the 53-minute defeat by Barty.

Barty - who has been beaten by only one player outside the world's top 10 this year - dropped just three points on serve in the first set, moving a double break up before the world number 182 was finally able to hold.

Dart went a double break down at the start of the second set before showing signs of her form of previous rounds, reaching four break points before allowing Barty to hold.

"It's a good learning curve for me," she said. "She played great. She didn't let me in the match at all.

"It's a tough lesson to learn. It's been a great tournament for me. I should take a lot of positives from it."

Barty, who is the first Australian to reach the women's singles fourth round at Wimbledon since 2010, said the young Briton had a bright future.

"Harriet is going to have a fantastic career. I know she will play out on Centre Court again soon," said the Australian, who will play American Alison Riske in the fourth round.