A volley from Konta and a wide forehand from Vekic sees the British number one hold.

Image source, Getty Images

Naomi Broady
British number three on BBC Radio 5 live sports extra

Vekic has a lot of variety in her game. You can see she doesn't want to stay in those rallies too long, maybe because of the type of player Jo is. She's trying to do something to mix it up.

Jo Konta's trademark ground strokes, where she gets down into a dangerously low lunge, are on display here.

Vekic overpowers her opponent for 0-15, but Konta recovers to 30-15 when the Croat messes up a drop shot.

The attacking Vekic plants a precise forehand into the corner for 30-30, but then hits miles out on the next point.

Konta's error brings us to deuce.

First up on Court One is ninth seed Kei Nishikori against Sergiy Stakhovsky.

The Japanese player has never been beyond the fourth round at Wimbledon but looked in imperious form as he ruthlessly dismissed Marco Cecchinato in round one.

It's still on serve early on against the Ukrainian.

Nishikori is not short of travelling support, complete with solid hat and t-shirt game.

Image source, Reuters

A confident hold of serve for 21-year-old Donna Vekic who, like Jo Konta, has never progressed past the second round of Wimbledon.

You sense this is going to be quite the battle.

Image source, Reuters

Annabel Croft
Former British number one on BBC TV

Konta's opponent today is tricky. Donna Vekic was a young star at 16 and she served 16 aces in the semi-final at Nottingham and a bunch of aces in the final against Konta. She'll love being out there on centre stage and this is not going to be easy.

Rosol steps up to a level it wasn't clear he had, racing into a 4-0 lead in the tie-break.

Muller nicks one back, then claims two crucial points on his impressive serve.

Oh my! Rosol thwacks a terrific backhand winner to leave Muller stunned and 5-3 down. He goes for another winner but pushes it long and we're back on serve.

Ace for Muller to make it 5-5. That's his 21st of the match. Then nearly his 22nd as Rosol can only get the edge of his racquet on another boomer.

Set point Muller but Rosol saves it. Then sneaks ahead. Set point Rosol but Muller makes a terrific pick-up off his feet to force the Czech to fire wide.

Muller strays wide again to give Rosol a second set point, but this time on his serve. And Muller goes long! Rosol takes the second set against the 16th seed.

Jo Konta opens her service game with a powerful ace and moves to 30-0 with a glorious forehand winner down the line.

Vekic tries to find the corner with a forehand, but it's long, and Konta holds to love when the world number 58 hits wide.

Image source, PA

Kim Clijsters
Former world number one on BBC TV

I've been impressed by Konta's consistency, she works hard and is disciplined. She's improving and I like the energy she brings to the crowd and she brings out on the court.

Vekic holds as Konta overcooks a forehand return, but the sixth seed is testing her Croatian opponent already.

Donna Vekic, the world number 58, gets day three under way on Centre Court.

She takes the first point, but Konta levels with a decent return, which is met by warm applause from the partisan crowd.

Vekic nets for 15-30, and then again for 15-40. Two break points to the British number one.

Konta wastes one opportunity with a forehand into the net, and Vekic saves another with a mid-air winner into the open grass. Deuce.

*denotes next server

Image source, PA

Annabel Croft
Former British number one on BBC TV

Konta's improved enormously on grass. She didn't have a good clay court season but she came into Nottingham and each match she played there she grew in stature.

Jo's a great athlete. She moves exceptionally well and has a big serve, along with a big second serve, that's really difficult to attack.

Better from Rosol in the second set - Muller's serve looking hard to get after but the Czech has at least held his own to set up a tie-break.

Image source, Getty Images

Here come the girls.

Johanna Konta and Donna Vekic get a big round of applause from the Centre Court crowd, who must be roasting out there.

One of these players will reach the third round of Wimbledon for the first time today. But who?

Let's find out...

Image source, Reuters

Jo-Wilfried Tsonga is currently out on court two, playing his 600th match.

He's got qualifier Simone Bolelli to contend with. Tsonga has never lost to a qualifier at a major before.

You can watch that match, and tons of others, over here.

Piers Newbery
BBC Sport at Wimbledon

Watson's win is a huge boost for a player who looked a little lost until the grass-court season. With her coaching situation now more settled, she reeled off three top-25 wins in a row in Eastbourne and has now knocked off the 18th seed at Wimbledon.

That means her ranking is projected to rise from 102 to somewhere in the 70s, high enough to avoid the need for wild cards into Grand Slams. She also has the chance to reach the fourth round of a Grand Slam for the first time.

Kyle: Brilliant performance from Heather Watson, great to see her playing attacking tennis and going for her shots.

David Church: What an excellent performance from Heather and the bonus as well is that she finished nicely in time for Johanna.

Lee Fergusson: Well done to Heather Watson!! She was absolute class in her straight sets win today!!

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Cibulkova has consolidated that early break and held off everything Brady has thrown at her in this second set.

The eighth seed needs just one more game to wrap this one up. The American is serving to stay in the match.

Image source, AFP