Norrie saves the break with a strong first serve.

But next point he slaps a backhand wide and it's as you were.

Tiafoe's starting to show his flair, winning with a cheeky lob and then a bruiser of a forehand into the corner.

30-30, big point, and Tiafoe completely wrong-foots Norrie with a backhand pass.

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Decent rally at 40-15 where some slices from Tiafoe put Norrie in danger. The American then steps forward into the next few shots and has Norrie running backwards as he attempts a pass that drops wide.

Good display of Viktoriya Tomova's power.

She fizzes two thunderous serves into Sonay Kartal's body and forces the Brit into a couple of unforced errors to keep hold of her sere.

American sixth-seed Madison Keys holds to take a 2-1 lead against Serb Olga Danilovic.

Good leave!

Norrie holds to 15 by quickly holding his sprint and letting a long backhand whizz under his nose as it clatters out.

We stay on serve.

Image source, Getty Images

Impressive hold from Sonay Kartal.

She goes down 0-30 after missing a simple volley and hitting wide, but she sends the Bulgarian out wide with a couple of serves and wins the next four points to hold.

This is looking like a decent start for Norrie.

Sure Tiafoe races to a 40-0 lead, but Norrie then wins two battles at the net, holding the pose after his second volleyed winner.

Tiafoe gets out of the game though with a standard serve out wide and then snappy forehand into the opposite corner.

But these two look evenly matched. So far, anyway.

Viktoriya Tomova hits a stunning forehand winner down the line to go 30-0 up.

Sonay Kartal finds the baseline chalk with an overhead before returning to the net to give Tomova the hold.

Hold to love in under two minutes. Nice one, Cam.

Off we go on Court One with Cameron Norrie serving first. And the Briton wallops a strong first serve which Frances Tiafoe can only skid well wide.

*Denotes server

If there's any nerves for Sonay Kartal, she didn't show it there.

She holds comfortably to 15.

Mel South
Former British player on BBC TV

Talk about settling straight into this match, great hitting from both women.

Gary Rose
BBC Sport at Wimbledon

Finally we get to see some action here at Wimbledon after this morning’s rain delay, with the matches due to start more than two hours ago now beginning.

Some big players have been sent crashing out already and one of those to go was 20th seed Jelena Ostapenko, who was beaten by GB’s Sonay Kartal.

Will she continue her run and get into the second round? Her match with Viktoriya Tomova has just got under way.

What a start.

Sonay Kartal takes the opening point against Viktoriya Tomova after a mammoth rally, finishing with a thunderous forehand winner.

Tim Henman
Former British number one on BBC TV

Sonay Kartal has been brilliant [over the last 12 months], I love her story, I love her journey and I think she is such an important role model because she has done it the hard way.

She has been out there grinding in some of the smaller events with her ranking down in the 300s, looking for those ranking points to break through into bigger tournaments to earn more prize money to invest in your game.

When you look at the top of British tennis, you have Katie Boulter, Emma Raducanu, Sonay in the top 50.

To beat Jelena Ostapenko in the first round will give her so much confidence because Ostapenko is a Grand Slam champion, she is such a dangerous player.

Hopefully Sonay can continue to build on that and move her ranking higher and higher towards the top of the game.

Image source, Getty Images

Gary Rose
BBC Sport at Wimbledon

Carlos Alcaraz may not be ranked world number one but he’s the star draw here, and the fact he was training on Court Seven prompted plenty of excitement from those passing by when they found out.

He was all smiles when he left the court and was cheered by the fans. He was looking in good shape despite his near five-hour first round epic.

Alcaraz is of course up against Britain’s world 733 Ollie Tarvet, who would pull off one of the biggest upsets in Wimbledon history if he wins.

Frances Tiafoe and Cameron Norrie walk out on Court One to a light smattering of applause.

Tiafoe has giant white head phones on. What do we think he's listening to?

Love Is A Losing Game by Amy Winehouse? That's the best tennis pun-related song I can come up with.

Right, we have movement.

Sonay Kartal and Viktoriya Tomova are making their way on to court three.