Roger Federer shows a clean pair of heels to Diego Sebastian Schwartzman and the Swiss's departure from Lenglen is our signal to end today's live text commentary. It was mostly a day of routine victories, but day four will be remembered for Serena Williams's surprise early exit from the tournament.

You can keep up to date with the latest men's and women's singles scores on this website. Bye for now.

Image source, Getty Images

Tomas Berdych is also through to the third round. The sixth seed had a few wobbles, but comes through in a 6-7 (4-7) 6-4 7-5 6-3 victory against Aleksandr Nedovyesov of Kazakhstan.

Image source, AFP

Thunderous whoops and whistles on Suzanne Lenglen as Roger Federer prepares to serve for the match. The former champion proceeds to 30-0 with little fuss, but Diego Sebastian Schwartzman responds with an irretrievable volley which has the excitable crowd clapping and cheering. The fourth seed soon grabs a match point and a tame return from the Argentine seals a 6-3 6-4 6-4 win for Federer.

Tommy Robredo, James Ward's conqueror, is two sets up against Kenny De Schepper - and what a turnaround on Court One because Tomas Berdych is a game away from winning his match against Aleksandr Nedovyesov. The Czech was broken early in the fourth set but now leads 5-3.

Diego Sebastian Schwartzman swinging loose on Lenglen like a man with nothing to lose. He holds firm against a couple of break points and pulls through to extend the match a wee while longer. Roger Federer, two sets up, serving for a 5-3 lead in the third set.

It's all happening in Roland Garros. Well, sort of. Jo-Wilfried Tsonga has won the first set 6-2 against Austria's Jurgen Melzer, while Tomas Berdych is on the comeback. The sixth seed was 3-0 down in the fourth set, but has broken back and is serving to level at 3-3.

Image source, AFP

Impressive serving, as you'd expect, from Milos Raonic who hit 20 aces on his way to a 7-6 (7-4) 6-4 6-1 win over Jiri Vesely. The big-hitting Canadian also made 49 winners.

Jo-Wilfried Tsonga cruising along a street named easy on Philippe Chatrier. The Frenchman, seeded 13th, leads Jurgen Melzer 5-2 in the first set. On the other side of the coin is Tomas Berdych. The sixth seed is 3-1 down in the fourth set against Aleksandr Nedovyesov so that match seems set for a decider.

Roger Federer sips some water during the changeover, content that he is the master of his own destiny after breaking Diego Sebastian Schwartzman in the third set.

Is there a cooler looking fifty-something than John McEnroe? The seven-time Grand Slam champion makes Juan Monaco,, external the former world number 10, a very happy man.

Piers Newbery
BBC Sport at Roland Garros

The 20-year-old Muguruza, who was born in Caracas but lives in Barcelona, also revealed that she will decide "in the next few months" whether she will officially represent Venezuela or Spain.

"It depends a lot on my family, because we are really separate. I have a lot of family in Venezuela and a lot of family in Spain. I have to really decide in which part I'm going to spend more time."

Piers Newbery
BBC Sport at Roland Garros

Garbine Muguruza proves to be as calm in front of the world's media as she was in front of the world number one.

"I was thinking I have a chance, I have to play really good to win," she said. "But I played her I think two years ago and it was horrible, because I was so nervous. I said, 'OK, this time I'm not going to think I'm playing against Serena. I'm going to do what I have to do.'"

Roger Federer has decided this is not a day for any funny business, no matter what Serena Williams says. The Swiss is two sets to the good against Diego Sebastian Schwartzman, winning the second set 6-4.

Elsewhere, Marin Cilic, the 25th seed, has beaten Germany's Tobias Kamke 6-3 3-6 6-3 6-0.

Image source, AFP

Roger Federer still capable of wizardry, making a muggle of Diego Sebastian Schwartzman with a clubbed forehand winner down the line for break point. But the fourth seed isn't as ruthless as he once was and allows the Argentine to wriggle free. That match is with serve at 4-4 in the second set.

Back to the action and eighth seed Milos Raonic is two sets up against Jiri Vesely of the Czech Republic. Marin Cilic's match against Tobias Kamke seems to be coming to an end because the Croatian - 2-1 up in sets - is leading 5-0 in the fourth.

Who should Murray choose to succeed Ivan Lendl? Should it be Mauresmo or one of the many others who have been linked with the job - Tomas Bjorkman, Tim Cahill, Larry Stefanki, John McEnroe...

You can tweet your thoughts using the hashtag #bbctennis or text 81111 - or add your thoughts to the BBC Sport Facebook page.

Piers Newbery
BBC Sport at Roland Garros

Amelie Mauresmo is today's contestant on 'who wants to be a Wimbledon champion's coach?' after being spotted watching Andy Murray in action yesterday. There is no confirmation that the two have even been in contact, but Franck Ramella of L'Equipe has given us some background on Mauresmo's coaching credentials.

"She's not very well recognised in France, considering everything she has done has turned to gold. When she became Fed Cup captain she really wanted Marion Bartoli because she wanted a strong team, and Bartoli didn't want to play. There were lots of arguments with the French Federation. It was the most impossible task and Mauresmo managed to do it. Then she was one of the key factors with Bartoli at Wimbledon because she had no coach.

"So Bartoli wins Wimbledon and France begins to win Fed Cup matches, which was not the case for a lot of years. She also worked with Michael Llodra, which shows she can work with men. In France, people were saying why can't she be Davis Cup captain? She was one of the names in the discussion."

There continues to be conjecture over who Andy Murray will choose as his next coach, with the Scot jokingly saying on Tuesday: "Nobody wants to work with me".

Amelie Mauresmo is another name recently added to the long list of possibles after the Frenchwoman was spotted watching the Wimbledon Champion's first-round match.

"I'd be quite surprised if it was Amelie but anything is possible," said Mary Pierce on BBC Radio 5 live. "I did notice that she was watching his match yesterday and I thought to myself 'why is Amelie watching this match?'. You never know but we'll know soon won't we?"

Perhaps those seeds who have been toppled over the last couple of days should listen to Dustin Brown's sage words.

The German lost to Marinko Matosevic in the first round on Tuesday, but tweeted with a picture: , externalIn this sport I'm starting to learn no matter how great the victory, how horrific the defeat, the next day is a fresh start

Image source, AP

Eighth seed Angelique Kerber is also through, reaching the second round with a 6-2 7-5 victory over American Varvara Lepchenko.

But Mikhail Youzhny, the 15th seed, is out after losing 6-0 6-3 3-6 6-4 to Redek Stepanek, while another women's seed - Flavia Pennetta - has also lost, beaten 5-7 6-4 6-2 by Johanna Larsson.