Novak Djokovic overcomes China's Wu Yibing 6-4 5-7 6-4 6-4 in gruelling Centre Court battle to reach Wimbledon second round
British men's number one Cameron Norrie loses in five sets to qualifier Michael Zheng - one of 10 home players to lose on opening day
Jack Draper pulled out of championships because of arm injury to join Emma Raducanu on sidelines
Men's champion Jannik Sinner overcomes Miomir Kecmanovic in five-set thriller
Women's top seed Aryna Sabalenka beats Teodora Kostovic 6-2 6-3
*Ostapenko 6-4 3-6 1-1 Dart
That is not what Harriet Dart would have wanted having taken the advantage in the opening game.
She too gives away the break with a double fault and shows her frustration.
But Dart has re-grouped many times already in this match, and with the help of the crowd will try and do that again.
Image source, Getty ImagesZheng 6-7 (7-9) 6-2 4-4 Norrie*
Michael Zheng forces deuce with a deep return before bringing up break point with a huge forehand that Cameron Norrie can do nothing about.
Norrie then serves an ace to save break point, prompting roars from the crowd on court two.
Sinner 4-6 6-3 0-0 Kecmanovic*
After losing the opening set, Jannik Sinner was desperate to get the second under way but he's feeling much more settled now and opts to take an extended break before the third will get going.
Sinner, with a towel draped over his shoulder and a drink in hand, trots off court for a comfort break.
Ostapenko 6-4 3-6 0-1 Dart*
Martina Navratilova
Nine-time Wimbledon singles champion on BBC Two
Jelena Ostapenko is yelling at her box once again.
Somehow it isn't her fault that she hit a double fault to hand Harriet Dart that opening game.
Ostapenko isn't a happy camper at the moment, Dart is definitely in her head now.
Image source, Getty ImagesOstapenko 6-4 3-6 0-1 Dart*
Perfect start for Harriet Dart!
The wayward ball toss that has been bothering Jelena Ostapenko all match shows itself again.
An opening game bookended by double faults sees Dart go ahead early in this deciding set.
Now, can she back it up?
Sinner 4-6 6-3 0-0 Kecmanovic*
Jannik Sinner has already put the hard yards in during this set to get to a seriously strong position.
Now just a hold of serve required to level.
The Italian kicks on for a 40-15 lead and wraps up the set with an ace.
Image source, Getty ImagesZheng 6-7 (7-9) 6-2 4-4 Norrie*
Michael Zheng is looking pretty comfortable out there at the moment on serve as the American holds to love.
He's got the chance to put the pressure right back on Cameron Norrie's serve now.
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As sad as it is, it's time to acknowledge that Draper's body is never going to let him compete at a high sustained level, and you can't blame the demands of the tours as he's not even played half a tour year let alone a full one.
Justin
*Sinner 4-6 5-3 Kecmanovic
Miomir Kecmanovic is up against it - a break now and the set is gone.
But the Serbian doesn't show any signs of wilting under the pressure. In fact, he rises to the occasion and gets the hold to 15.
*Zheng 6-7 (7-9) 6-2 3-4 Norrie
At game point Cameron Norrie skews a forehand wide and the game goes to deuce.
The British 26th seed gets out of trouble as Michael Zheng goes into the net, before the American is unable to return a big first serve.
Norrie clenches his fist before the change of ends - he faced some pressure in that game but dealt with it well.
Image source, Getty ImagesRuud 4-6 2-6 3-2 Hurkacz*
Jeff Tarango
Former American tennis player on BBC Radio 5 Sports Extra 2 and BBC Sounds
Ruud relies so much on his spin and the bounce he gets off the court but the grass negates that.
It's got to be old school tennis - he's trying to slice the backhand a lot off the return and when he's close to the net. He doesn't have a volley and he's not passing as well because the grass is different to clay.
It's just a completely different world for Ruud than it is for Hurkacz.
Sinner 4-6 5-2 Kecmanovic*
I feel my celebrity knowledge is letting me down today, I'm struggling to put names to faces as the camera pans across the Royal Box.
I have just spotted Ronan Keating of Boyzone fame though.
Image source, Getty ImagesRuud 4-6 2-6 3-2 Hurkacz*
11th seed Casper Ruud will have to go the distance to reach the second round of Wimbledon.
He's trailing Hubert Hurkacz by two sets after losing the second 6-2.
Ruud has had his serve broken three times across the match but for now, the third set is going with serve - the Norwegian leads 3-2.
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If Sinner's already as good as he is with obvious physical limitations compared to some of his peers, just imagine how dominant he could be if or when he finally gets to full strength. A bit like Djokovic when he changed his diet mid-2010.
Tobias
Sinner 4-6 5-2 Kecmanovic*
We're treated to a very tense rally with neither man prepared to take a backwards step.
Eventually, it's Jannik Sinner who prevails with a winner into the corner for advantage.
Sinner holds his nerve on the next point, stepping up to the net and guiding aaway a cross-court winner for the hold.
Image source, Getty ImagesZheng 6-7 (7-9) 6-2 3-3 Norrie*
Michael Zheng has played some lovely shots in this match and his latest is a delicate volley across court when it looked like he was going to go down the line.
The crowd show their appreciation with some loud applause.
An ace then wraps up the game for the American.
Draper out of Wimbledon
Naomi Broady
Former British player on BBC Radio 5 Live
Image source, Getty ImagesI'm gutted because it would have been such a special moment to see Jack Draper play on Centre Court with Andy Murray in his coaching box but we're going to have to wait another year.
*Sinner 4-6 4-2 Kecmanovic
Miomir Kecmanovic is playing on the limits and pushes it just slightly too far as his whipped forehand lands millimetres over the baseline for deuce.
*Ostapenko 6-4 3-6 0-0 Dart
Chris Bradnam
BBC Sport commentator on BBC Two
You have to applaud the fight of Harriet Dart.
Yes, she got a lot of help with the unforced errors from Jelena Ostapenko, but it has been a really gutsy performance from the Briton.
Image source, Getty Images*Ostapenko 6-4 3-6 0-0 Dart
Emily Salley
BBC Sport at Wimbledon
We're going the distance! The crowd are on their feet as Harriet Dart wraps up the second set to level the tie.
Jelena Ostapenko looks furious as she strides off court for a breather.
