Jannik Sinner out on day five of French Open in huge upset
Sinner beaten in five sets by Juan Manuel Cerundolo after struggling with Paris heat
World number one Sinner led 6-3 6-2 5-1 but took a medical time-out when serving for match in third set
Sinner went off court after losing third set and has been struggling to move and serve since
The Italian is the huge favourite for title after dominating men's tour in recent months
Listen to BBC Radio 5 Sports Extra commentary via link at top of page
Sinner 6-3 6-2 5-7 1-6 1-6 Cerundolo
Annabel Croft
Former British number one on BBC Radio 5 Sports Extra
This is a seismic shock. So many of us were standing there at the start of this tournament saying, who on earth can challenge Sinner for this title.
Everyone was on their feet, I think they were a bit stunned at the way the drama played out. It certainly opens this tournament and send shock-waves through the draw.
Sinner 6-3 6-2 5-7 1-6 1-6 Cerundolo
World number one and top seed Jannik Sinner is OUT of the French Open, knocked out in five sets by Juan Manuel Cerundolo.
Sinner 6-3 6-2 5-7 1-6 1-5 Cerundolo*
Annabel Croft
Former British number one on BBC Radio 5 Sports Extra
Carry on and see what happens is good advice from the Sinner camp. It isn't about the tactics any more, it is about the physicality.
*Sinner 6-3 6-2 5-7 1-6 1-5 Cerundolo
The Jannik Sinner of the first two sets is long gone now, but the Italian can still show flashes of brilliance, as evidenced by the ferocious forehand return with which he punishes a nervy second serve from Juan Manual Cerundolo.
Sinner earns a couple of break points but Cerundolo stays strong to hold.
He is now just one game from a famous victory.
Sinner 6-3 6-2 5-7 1-6 1-4 Cerundolo*
Annabel Croft
Former British number one on BBC Radio 5 Sports Extra
That was the most pace that Sinner has put in his serve. I don't think he has it in him to do long physical rallies at the back of the court but he has it in him to energise some of the ground strokes. I think we will see him still fight.
Sinner 6-3 6-2 5-7 1-6 1-4 Cerundolo*
A welcome hold for Jannik Sinner, which pleases the crowd.
The world number one walks to his chair and slumps down in it. Can he summon any more energy to deny Juan Manuel Cerundolo the biggest win of his career, and the biggest shock of the tournament?
Sinner had lost 16 of the previous 17 games before that service hold.
*Sinner 6-3 6-2 5-7 1-6 0-4 Cerundolo
Surely there's no way back now for Jannik Sinner as Juan Manuel Cerundolo wraps up another easy service hold.
But can the inexperienced Argentine, the world number 56 who has never reached the third round of a Grand Slam before, hold his nerve as the finish line approaches?
Sinner 6-3 6-2 5-7 1-6 0-3 Cerundolo*
Annabel Croft
Former British number one on BBC Radio 5 Sports Extra
Sinner looks like he is about to throw up in the middle of the court, he is not in good shape.
Sinner 6-3 6-2 5-7 1-6 0-3 Cerundolo*
The Chatrier crowd try to give Jannik Sinner some encouragement but Juan Manuel Cerundolo has got the bit between his teeth.
He's moving Sinner around, and the world number one just can't deal with it.
Sinner saves three break points but he's only delaying the inevitable, and Cerundolo breaks when Sinner nets a forehand.
From 5-1 in the third set, Sinner has won just one of the past 16 games.
*Sinner 6-3 6-2 5-7 1-6 0-2 Cerundolo
Annabel Croft
Former British number one on BBC Radio 5 Sports Extra
Image source, Getty ImagesThis is just so impressive by Cerundolo, he just has his head down and isn't distracted by what is happening at the other end of the court. This could be one of the all-time greatest upsets.
*Sinner 6-3 6-2 5-7 1-6 0-2 Cerundolo
It's an easy hold for Juan Manuel Cerundolo.
He looks like he has got used to playing a compromised opponent and is ready to exploit the opportunity.
Sinner 6-3 6-2 5-7 1-6 0-1 Cerundolo*
Jannik Sinner seems determined to give it a go but mishits an overhead on the very first point of the deciding set. Is that an omen?
A long rally finishes with a Sinner error and he then undercooks a drop shot to give Cerundolo an early chance to break.
Sinner is coming to the net when he can now to shorten the points - and even manages to find the energy for fist pump after putting away a volley.
But Cerundolo is chasing everything down and earns the early break.
*Sinner 6-3 6-2 5-7 1-6 0-0 Cerundolo
Annabel Croft
Former British number one on BBC Radio 5 Sports Extra
I just didn't see this scenario happening, no one knew it was going to be this hot, this sweltering, these brutal conditions and I think we underestimate how much it takes out of them. Being out there in this climate is like being in a cauldron or an oven.
*Sinner 6-3 6-2 5-7 1-6 0-0 Cerundolo
Image source, Getty ImagesWorth emphasising again that Jannik Sinner entered the French Open as one of the most overwhelming favourites to win a men's Grand Slam in recent times.
His big rival Carlos Alcaraz, the defending champion, is missing the event with a wrist injury.
Sinner had won 37 of 39 matches in 2026 before this one, has lifted plenty of titles and he has not lost since a defeat by Jakub Mensik in Doha in mid-February.
*Sinner 6-3 6-2 5-7 1-6 0-0 Cerundolo
Annabel Croft
Former British number one on BBC Radio 5 Sports Extra
This is not the first time that I have seen Sinner with nothing left in the tank and then suddenly he will find something when it matters.
Image source, Getty Images*Sinner 6-3 6-2 5-7 1-6 0-0 Cerundolo
Juan Manuel Cerundolo enjoys a comfortable hold of serve, and we are going into a fifth and deciding set.
Sinner 6-3 6-2 5-7 1-5 Cerundolo*
Jannik Sinner's box are trying to encourage him but the world number one is still really struggling.
A couple of incredibly slow second serves give Juan Manuel Cerundolo another chance to break - and the Argentine player does just that.
Cerundolo will now serve for the fourth set.
*Sinner 6-3 6-2 5-7 1-4 Cerundolo
Jannik Sinner is trying to keep the points short and blasts a couple of winners to go 0-40 up.
But Juan Manuel Cerundolo knows he has to keep Sinner on the move, and wins the next five points by doing just that.
Even walking is a struggle for Sinner again at the moment.
Sinner 6-3 6-2 5-7 1-3 Cerundolo*
Annabel Croft
Former British number one on BBC Radio 5 Sports Extra
Sinner went for a quick point and got the smash away and he couldn't even celebrate that, he is just weary. I feel like we are watching someone in the desert.
Image source, Getty ImagesSinner 6-3 6-2 5-7 1-3 Cerundolo*
Jannik Sinner is really digging deep here but it might not be enough.
A forehand clips the net and lands out, to leave him facing two break points.
And Juan Manuel Cerundolo clinches the break by chasing down a Sinner drop shot and putting it out of the Italian's reach at the back of the court.
