What a vital hold for Joe Salisbury and Luisa Stefani.

At 15-30 down, they win the next three points for a crucial hold of serve - helped by some beautiful volleying from Salisbury.

Louise Pleming
Former professional tennis player on BBC TV

That allows Verbeek to be a little bit more flamboyant doesn't it.

The fact that Siniakova is so consistent and solid, that allows him to try for those kind of points.

Image source, Getty Images

So efficient from Sam Verbeek and Katerina Siniakova.

They've been supreme on Siniakova's serve so far.

They get the hold to love, with two sumptuous smashes from Verbeek.

Luisa Stefani is back on her feet and looks good to go.

Luisa Stefani's called for medical treatment and is now being put through her paces.

It looks like the issue is to do with her hip.

Jess Anderson
BBC Sport at Wimbledon

Luisa Stefani is down and receiving medical treatment. I'm not sure what's happened but she seems to be in a bit of bother.

A bit of concern here for Luisa Stefani.

The Brazilian seems to have an issue with her hip and is being assessed by the trainer before a decision is made on whether to call a medical timeout.

Louise Pleming
Former professional tennis player on BBC TV

That was some terrific exchanges and just some really explosive hits.

Medical attention has now gone the way of Luisa Stefani, I didn't really see anything.

That is stunning from Katerina Siniakova.

She hits a beautiful forehand winner before an even better backhand volley to go 0-30 up.

Sem Verbeek gives the duo three break points with his own forehand winner down the line.

The pair take the third of three break points and we have our first break of the match.

A huge hold from Sem Verbeek and Katerina Siniakova.

The pair save two break points, as Joe Salisbury and Luisa Stefani miss a big opportunity to get their noses ahead in this second set.

Joe Salisbury and Luisa Stefani get the hold to 15.

A bit of controversy on the second point of the game as Katerina Siniakova was adjudged to have let the ball bounce twice, when replays showed she got there after the first bounce.

Sem Verbeek and Katerina Siniakova take the tie-break after Luisa Stefani puts long.

There was nothing in that first set but Verbeek and Siniakova turned it up a notch when it really mattered in the tie-break.

Katerina Siniakova volleys at the net to earn three set points.

Sem Verbeek slams an overhead volley to further widen the gap.

But Luisa Stefani does incredibly well at the net to wipe off one of the mini-breaks.

Still a long way to go to get back into this tie-break.

Katerina Siniakova gets the double hold to make it four points in a row and take firm control.

A huge couple of serves coming up for Luisa Stefani.

Ah.

Bubble burst. Joe Salisbury double faults to scratch that mini-break.

Sem Verbeek attacks Salisbury's slower second serve and hits a winner down the line.

Verbeek and Katerina Siniakova have flipped this tie-break on its head.

An entertaining rally to get us going and it's Joe Salisbury and Luisa Stefani who last the distance to get an early mini-break.

That breeze Jess mentioned seems to be having an impact. Luisa Stefani has just tossed the ball up and decided to pull the plug on her serving motion a couple of times.

Anyway, Stefani and Joe Salisbury get the hold and we're going to a tie-break.

Jess Anderson
BBC Sport at Wimbledon

There's a proper breeze swirling around Centre Court now. While it's welcome for these punters who've been sat here in the blazing heat all day, it could make things interesting in the match as Luisa Stefani serves to keep her and Joe Salisbury in the set.

Katerina Siniakova keeps this mixed doubles final on serve.

Siniakova and Sem Verbeek are guaranteed at least a tie-break to settle this opening set.