Serena beats Bacsinszky 4-6 6-3 6-0
Williams looked unwell for long periods
Safarova beats Ivanovic 7-5 7-5 in 1st semi
Safarova into first Grand Slam final
Image source, Roland Garros/TwitterFrench Open finalist Lucie Safarova in her post-match news conference: "It's slowly sinking in that I've reached the final...the happiness is unreal!
On closing out the semi-final win: "I think when I finally realised I could be in the final I was overthinking."
Do you remember Serena Williams having to withdraw from the doubles event at Wimbledon last year because of a virus?
If not you can check the video here.
She was a compete shambles that day. Unable to throw the ball up straight, serves hopping tamely into the net on the bounce.
Williams is not that bad today, but she is not much better.
She scrapes through a service hold, but her body language screams that she wants off court and out of there.
Kheredine Idessane
BBC Scotland at Roland Garros
"How on Earth did Bacsinskzy stay in that point? Wonderful defending, almost Andy Murrayesque, making her opponent make one more shot when Serena looked like she had the point won two or three times. Then she was made to play the extra shot and missed. Incredible."
Lukas Rosol, Steve Darcis, Sergiy Stakhovsky.
I reckon that Timea Bacsinszky could be about to join an elite band of giant-killers.
The Swiss shows no mercy, forcing an apparently suffering Serena Williams into shuttle runs at the back of the court to defend set point at 40-15.
Williams takes on the role of line judge, calling a Bacsinszky groundstroke long and convincing the umpire of her case as she clambers out of her high chair for a better look.
A rolling forehand across court saves the second set point for Williams, but Bacsinszky shows that she has stomach for the fight, blasting away a corking forehand to set up a third from deuce.
Image source, Reuters
Piers Newbery
BBC Sport at Roland Garros
"Williams wraps herself in towels at the changeover and asks the umpire, 'That's not the set is it? Because they're sweeping the lines.' She then buries her head in an ice towel, and takes a glug of water.
"The world number one is in real trouble; hard to see how she finishes this match, let alone as the winner."
Image source, Getty Images
Russell Fuller
BBC tennis correspondent on Radio 5 live sports extra
"Serena often walks slowly around the court in the early stages of matches, but she is clearly struggling - no doubt about it. Now she is wrapping an ice towel around her forehead. If you've got a headache and then are playing sport in 28C heat, it is not a pleasant place to be."
Serena Williams is struggling here.
She has held to 30, but the story is not the scoreboard.
The American looks to be on the point of tears, mopping her brow between points, blinking as she stares downcourt, and hobbling to her seat at the changeover.
If she is playing possum to try and lure Bacsinszky into a false sense of security, it is an Oscar winning performance.
Bacsinszky to serve for the opening set.
Beaten semi-finalist Ana Ivanovic in her post-match news conference: "I'm really proud of what I achieved in these two weeks. I'm aware that there's still room for improvement and that is the exciting part."
Timea Bacsinszky is showing no signs of stuttering or faltering.
The Swiss gets a chunky slice of luck with a thick netcord that bounces her way, but there was nothing streaky about the rest of the game.
Bernie Austin: I like what Bacsinszky is doing so far Serena needs her A game quickly! Can she maintain this level?
Serena Williams bellows a "C'mon" down court after bashing away a backhand. That was directed at herself as much as Timea Bacsinszky or her camp.
Image source, Getty ImagesShe is trying to rev herself up. Will it take the loss of the first set to jump-start her game? Or is not going to be able to fight off whatever is ailing her as well as Bacsinszky?
Serena is coughing heartily at the changeover...
Bacsinszky is two holds away...
BBC Radio 5 live sports extra
American journalist, and 5 live sports extra co-commentator, Courtney Nguyen: "Bacsinszky is completely outplaying Serena so far. We know Serena's quality but Bacsinszky is doing what so many fail to do when under pressure against the American - that is getting on top of the things given by Serena. She is keeping Serena running and on the defensive."
That won't make Serena feel any better.
Timea Bacsinszky is showing some very unSwiss aggression, snarling at anything short and walloping winners.
A hold to consolidate the break and clear blue water between her and the world number one.
Image source, Getty ImagesGood call Ali.
Williams was clutching a towel to her forehead and had ice packs round her neck during the changeover, doing her best impression of an Austin-era debutante with a fit of the vapours.
Intriguing.
Ali: Can't get used to Serena's body language between points. She looks uninterested! Injured? Unwell? Poker face?
BBC Radio 5 live sports extra
American journalist, and 5 live sports extra co-commentator, Courtney Nguyen: "Serena Williams doesn't give you much but whatever she has given Bacsinszky has taken. It has been a perfect start for Bacsinszky, she has managed to shrink the court a little bit and show Serena that she has to deliver that little bit more to get past her.
Image source, Getty Images"Bacsinszky is clear in her mind and is clear in her game plan. What a return to gain that break!"
Timea Bacsinszky works up a break point at 30-40, but, even under the weather, Serena Williams has that serve to cling to.
One right up on the apex of the service box knocks Bacsinszky back a step. But the Swiss is not to be denied.
A rasping return winner from the underdog earns a pat of applause from Wiliams, a glorious backhand lob earns another bite at the break cherry and a crunching return sends her back to her stool ahead on the scoreboard for the first time.
Nice!
Timea Bacsinszky bops a forehand down the line, before closing out the game with a spicy ace.
Serena Williams has been a slow starter in previous rounds this fortnight and she is not chasing too hard.
"Get on the balls of your feet." Is probably what coach Patrick Mouratoglou is shouting from the players box.
Image source, Getty ImagesPiers Newbery
BBC Sport at Roland Garros
"Bacsinszky might hail from Lausanne but she could relish the toasty conditions on Chatrier today after enjoying the best run of her career in Mexico earlier this year. The Swiss won 10 matches in a row as she took the titles in Acapulco and Monterrey. The unofficial (my phone) temperature of 26C would not normally trouble Florida-resident Serena, but she has felt unwell throughout the tournament."