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Carlos Alcaraz gets a couple of first serves in which Daniil Medvedev can't return to take himself to 40-15.

The third seed then holds by polishing off a rally - the best of the match so far - with a forehand winner right into the corner.

The defending champion celebrates in trademark style as he point his finger towards his ear, much to the delight of Centre Court.

Gustavo Fernandez hits into the net to give Alfie Hewett a fifth match point.

Fernandez's sweeping return flies past Hewett and we're back to deuce.

Fernandez then finds the line with brilliant accuracy as he saves a fifth match point.

Superb return from Gustavo Fernandez across the court.

Hewett responds with a powerful forehand to bring us to deuce for the third time.

He then finds the line brilliantly to bring up his fourth match point.

But no... back to deuce again.

Todd Woodbridge
Former Wimbledon doubles champion on BBC TV

Carlos Alcaraz is set in a good position, but Medvedev is doing his very best to push Alcaraz out.

You can see where Carlos is missing with the red dots. He is getting drawn out of the court and trying to hit way too much.

Unforced errors continue to blight Carlos Alcaraz's performance as Daniil Medvedev holds to love.

There's some thoughtful expressions on the faces of the Spaniard's coaching team at the moment.

Todd Woodbridge
Former Wimbledon doubles champion on BBC TV

Alcaraz has not played with discipline at all and he’s playing a man who has great discipline.

He did well to hang in that set let’s be honest, Medvedev had all the chances. The forehand is worrying for Alcaraz and his inability to choose the right shot. His patience is thin today.

Emily Salley
BBC Sport at Wimbledon

What about that for a second serve! 121mph.

And what a time to pull it off.

Whatever happens in this match, Daniil Medvedev has already made a better go of this semi-final compared to last year.

A third match point for Alfie Hewett as Gustavo Fernandez's shot is long.

Fernandez saves match point again with a sliced forehand which is out of Hewett's reach. Deuce.

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Carlos Alcaraz starts the second set with a second serve ace before slamming a forehand winner past Daniil Medvedev.

The Russian then puts a forehand long as Alcaraz holds.

The court three crowd have been treated to a great match this afternoon.

Alfie Hewett plays an excellent shot behind Gustavo Fernandez as he takes control in the game.

Fernandez then hits into the net as Hewett brings up two match points.

Another Hewett double fault gives Fernandez hope.

Fernandez saves the second match point. Deuce.

Tim Henman
Former British number one on BBC TV

Credit to Medvedev, he stepped-up in the tie break to dominate proceedings.

That is an exact reflection of Alcaraz's performance in the tournament. There has been some good stuff, but it has been too erratic.

Andrew Cotter
Commentator on BBC Two

However good you are, and Alcaraz is already establishing himself as one of the greats, you cannot give gifts.

Carlos Alcaraz is being outplayed in this tie break as Daniil Medvedev earns set point with a forehand winner past the stranded champion.

The Russian fifth seeds wraps the set up as Alcaraz puts a big first serve into the net.

Long from Gustavo Fernandez to put Alfie Hewett in a promising position.

Hewett seals two more break points and takes the first one after Fernandez fires into the net.

Hewett has another chance to serve for the match.

Carlos Alcaraz slams a forehand which Daniil Medvedev somehow returns for a 4-0 lead, before Carlos Alcaraz fires a backhand into the net.

Medvedev is finding his best tennis at the most crucial moment.

He's 5-1 up at the change of ends.

Mini break for Daniil Medvedev as Carlos Alcaraz loops a forehand long.

The Russian then extends his advantage with a magnificent return winner down the line.

Alfie Hewett overdoes his shot and gifts Gustavo Fernandez a break point.

Fernandez hits long and brings us to deuce.

Hewett produces his fifth double fault of the match and Fernandez has another break point which he takes, firing across the path of Hewett.

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Unforced errors are still punctuating Carlos Alcaraz's game as he misses a fairly straightforward forehand, by his high standards.

An overhead smash then brings up game point for the defending champion, before he seals it as Daniil Medvedev goes wide.

Tie-break time.

Gustavo Fernandez races into a 0-30 lead after Alfie Hewett hits into the net.

Not easy to get over the line when there is so much at stake.

Fernandez then hits long twice and lets Hewett back into the game. 30-30.