Well Tracy, Teodora Kostovic has started the second set with a confidence-boosting hold to 15.

She cups her hand behind her ear after Aryna Sabalenka misses a backhand on game point.

Tracy Austin
Two-time Grand Slam champion on BBC One

You just wonder does Kostovic have another level. What can she do now? Does she have another level to her game? She's just been trying to hit heavy at Sabalenka.

Aryna Sabalenka goes wide again, this time a second serve to Teodora Kostovic's backhand, and punches her fist as the return goes into the net.

The world number one takes the first set 6-2.

Image source, Getty Images

Aryna Sabalenka targets Teodora Kostovic's forehand with a couple of big serves for 30-0 but is a little bit loose on the next two points, sending wild forehands long.

Cool as a cucumber, she serves out wide to earn set point.

Teodora Kostovic holds with an ace. She's saved break points in back-to-back service game.

Aryna Sabalenka will serve for the set.

It's a safe passage to the second round for Russian eighth seed Daniil Medvedev, who has beaten 2017 Wimbledon finalist Marin Cilic in straight sets.

Medvedev, a semi-finalist at the All England Club in 2023 and 2024, won 6-1 6-2 6-4 inside one hour and 52 minutes.

Image source, Getty Images

Aryna Sabalenka throws her head back in frustration. She can't believe her backhand drop shot has drifted into the tramlines.

She'd done so well to set up that point, dragging Teodora Kostovic all around the court.

Teodora Kostovic gives up a 30-0 lead with a couple of loose forehands.

Aryna Sabalenka drags Kostovic out wide on her backhand and rushes the net, drawing another error. Set point.

I'll be honest, it's not looking good for British hopes at the moment.

Oliver Tarvet fought back to win the third set against Arthur Rinderknech, but is trailing 6-7 (4-6) 6-7 (4-6) 6-4 3-2* against the French 25th seed.

In the women's singles, Britain's Mimi Xu has lost the first set 6-2 against Australia's Daria Kasatkina, while Hannah Klugman is 3-0 down in the first set against 2024 winner Barbora Krejcikova.

It follows the earlier exits of Britons Cameron Norrie, Harriet Dart, Felix Gill, Mika Stojsavljevic and Max Basing, while Jack Draper withdrew before his first-round match with injury.

Another brisk hold to 15 for Aryna Sabalenka.

Eugenie Bouchard
Former Canadian tennis player on BBC One

Aryna Sabalenka used to get the yips on her serve, and as an opponent you knew that she was going to gift you those free points.

It used to be a liability for her, but now she has made it not only back to neutral but also a real strength of her game.

Teodora Kostovic is on the board, saving a break point and coming through deuce for her first hold of the match.

A run of errors from Aryna Sabalenka.

Aryna Sabalenka looks frustrated as she wastes that break point with a backhand error.

That's better from Teodora Kostovic! She opens her service game with a double fault but responds with a well-placed kick serve which a sprawling Aryna Sabalenka returns to long.

She's dragged around the court by Sabalenka on the next point but once again responds with spirit, improvising a two-handed backhand volley winner at the net.

But then Sabalenka bludgeons a backhand to earn another break point.

Aryna Sabalenka double-faults at 30-0 but closes out another hold to 15, this time with a delicate forehand drop shot.

Linda: Considering there are few countries that play on grass you would think the British players could do better. Already six beaten on first day. Not much to cheer about, is there?

Jason: Probably the least interesting year on record for British hopes in my lifetime. Two possible challengers (Draper and Emma) pull out of the tournament the night before their games and the other potentials get beat day one. Gone are the good old days with Andy Murray and co going deep.

Carl: What an absolute horror show for British tennis the last two days have been. Injuries, and early exits galore. So poor for one of the best-funded tennis set-ups in the world - but not really surprising anymore, I guess.

Paul: World's premier tournament, and the Brits can't get past first round. Hopeless.

Aryna Sabalenka nets a backhand off a second serve to spurn the first break point.

But she capitalises on the second as Teodora Kostovic plants a forehand in the net.

Teodora Kostovic challenged Aryna Sabalenka to match her power and isn't shying away from baseline exchanges. But there are too many errors flying from her racquet.

15-40.

A comfortable hold to 15 for Aryna Sabalenka.

She opens the service game with an ace. A messy backhand for 40-15 is the only blot.

Image source, PA Media

Annabel Croft
Former British number one on BBC Radio 5 Live

We're not 100% sure on the vulnerability of Sabalenka these days.

I think it's more about her beating herself and there's been some question marks over her performances lately. She was always a raw tennis player, a ball-blaster and a big character on court but she's also worked on her game and tried to be more creative and patient.

But lately I've started not to trust her on the back of the court and I'm never quite sure what she's going to do next.