The momentum really is with Amanda Anisimova now, though.

Anisimova gets the second set going with a hold to 15.

Aryna Sabalenka has come from a set down to win a Grand Slam semi-final on two previous occasions.

She trailed Iga Swiatek in the French Open semi-finals earlier this year and also came through after losing the opening set against Madison Keys at the US Open in 2024.

Tracy Austin
Two-time Grand Slam champion on BBC One

I am so impressed by the way Anisimova has come out and played. You dream of this as a little girl on Centre Court at Wimbledon. There's such commitment in her groundstrokes. She's hitting well, she's moving well, she's anticipating. Her return of serve is at the top of women's tennis. If she sustains this it will be tough for Sabalenka.

Jess Anderson
BBC Sport at Wimbledon

After an absolutely gruelling game, it's a double fault that decides the set.

That is so disappointing for Sabalenka.

She, unsurprisingly, leaves the court.

Wow.

A double fault from Aryna Sabalenka hands over the set.

After such a tense and intriguing battle through that game, it's such a shame to see it decided in that fashion.

David Law
Commentator on BBC Radio 5 Live

This is one heck of a set of tennis, both in terms of the drama but also the quality. They are playing well at the same time which is the dream.

But Aryna Sabalenka quickly rips that opportunity away with a big serve.

The world number one then whips a winner into the corner for advantage before being dragged back to sixth deuce.

Amanda Anisimova just will not go away. She brings up a second set point.

Amanda Anisimova gets set point when Aryna Sabalenka's down the line attempt strays into the tramlines.

Aryna Sabalenka earns advantage but offers Amanda Anisimova a golden chance to drive through a backhand winner and the 13th seed takes it.

Anisimova looks to use that backhand again but this time it crashes into the net.

The American brings up fourth deuce after stepping into the court and attacking with a forehand.

Naomi Broady
British player on BBC Radio 5 Live and BBC Sounds

Image source, Getty Images

This is Aryna Sabalenka who Amanda Anisimova is returning against here, one of the best serves in the whole of women's tennis and just clean, out the racquet, out the middle of the strings, putting the ball wherever she wants it.

Amanda Anisimova wants the set wrapped up in this game.

The American gets to deuce after slamming a winner at the net.

We're back under way after that latest break.

Aryna Sabalenka will serve to stay in the set.

David Law
Commentator on Radio 5 Live

We're looking at the sort of heat that you wouldn't want to spend a long time sitting in.

Anyone who has got a ticket here to come to semi-finals day is thrilled and doesn't want to move and wants to see every ball, but these are tough conditions, this is seriously hot.

Jess Anderson
BBC Sport at Wimbledon

Image source, Getty Images

Doctor Sabalenka strikes again.

Another spectator in the crowd has fallen ill during the change of ends. Sabalenka spots them and heads over to hand out a water bottle.

Whatever mental work Amanda Anisimova work has done, it's working.

The American looks comfortable - as comfortable as can when playing Aryna Sabalenka - out on Centre Court.

Anisimova gets a hold to 15 and is one game shy of taking the opening set in this semi-final.

Tracy Austin
Two-time Grand Slam champion

Really impressed by Anisimova. It's her second semi-final - her first in six years. She's really composed and so focused. She's done so much work on her mental side of the game.

It already feels like a lifetime ago that Aryna Sabalenka and Amanda Anisimova both picked up a hold to love in games three and four.

Every point is a battle now.

Sabalenka holds to 30 this time.

Laura Robson
Former British number one on BBC Radio 5 Live and BBC Sounds

That was super impressive. It just feels like Aryna Sabalenka needs to go one more forehand cross-court, she's so used to being able to change direction exactly when she wants to on forehand side, but that's just playing into her opponent's strength.

A really intriguing match up so far.

Naomi Broady
British player on BBC Radio 5 Live and BBC Sounds

Image source, Getty Images

Aryna Sabalenka has really started in the last year or two to add that extra dimension [the drop shot] into her game and it just really complements her so well because look at the court position she's got Amanda Anisimova in there.

Aryna Sabalenka goes big again on the serve return but it's straight into the net.

Amanda Anisimova seizes the opportunity to get the hold this time.

Four break points saved for the American in that game.