British wildcard Emma Raducanu retires when trailing Ajla Tomljanovic 6-4 3-0
Raducanu left court for medical attention at change of ends & did not return
Roger Federer beats Lorenzo Sonego 7-5 6-4 6-2 to make last eight
Top seeds Novak Djokovic & Ashleigh Barty through in straight sets
Fourth seed Alexander Zverev loses in five sets to Felix Auger-Aliassime
Wins for Angelique Kerber, Ons Jabeur & Aryna Sabalenka
Martina Navratilova
Nine-time Wimbledon singles champion on BBC TV
This game is a momentum maker. If Ajla wins the set it's a big shift. but if Emma holds she will be pretty relieved she is still in the set.
*Raducanu 4-5 Tomljanovic
Raducanu is hanging on. Set point Tomljanovic.
*Raducanu 4-5 Tomljanovic
Tomljanovic saves game point, but an ace from Raducanu sets up another chance to end this game.
The Australian dominates a rally from the back of the court, though, and despite some great defensive work from Raducanu we return to deuce.
This is TENSE.
*Raducanu 4-5 Tomljanovic
While everyone holds their breath, Emma Raducanu is busy holding her nerve.
Some big baseline hits are exchanged, but it's Tomljanovic who misses first.
*Raducanu 4-5 Tomljanovic
There's a chance here for Tomljanovic at 30-30, but Raducanu works her opponent around the court with some hefty forehands and the Australian eventually runs out of replies.
The crowd get behind their star with shouts of 'Come on Emma' as Raducanu is taken to deuce.
Martina Navratilova
Nine-time Wimbledon singles champion on BBC TV
Great defending from Raducanu. She recovers extremely well so that allows her to neutralise the shots Tomljanaovic is hitting, making her overhit it.
*Raducanu 4-5 Tomljanovic
There's no room for error here for Raducanu. The first set is on the line.
She hits long at the net for 15-15, but produces a big serve when she needs it to edge ahead.
*Raducanu 4-5 Tomljanovic
Tomljanovic eventually makes an important hold as we enter the business end of the first set.
A big, big game coming up for Raducanu now...
Raducanu 4-4 Tomljanovic*
A second chance presents itself for Raducanu, but Tomljanovic curves a forehand winner to deny the Briton once more.
The Australian double faults on game point, however.
Katie Falkingham
BBC Sport at Wimbledon
A sly smile from Emma Raducanu as Ajla Tomljanovic challenges. I think she knew that was out.
Raducanu 4-4 Tomljanovic*
Raducanu's shot is out, but she tries a cheeky challenge just to be sure.
Back to deuce...
Raducanu 4-4 Tomljanovic*
Now then!
A second break point opportunity of this opening set for Emma Raducanu as Tomljanovic whips one into the tramlines.
Raducanu 4-4 Tomljanovic*
Who will blink first on Court One?
Raducanu pegs Tomljanovic back at 30-30, but she can't crank up the pressure as she nets.
The game isn't gone though! Deuce.
Raducanu 4-4 Tomljanovic*
A thunderous ace for 40-15.
Another for the game.
Superb.
Tomljanovic challenges, but Raducanu scorched the 'T' with that one.
On we go in this first set!
Katie Falkingham
BBC Sport at Wimbledon
Excluding the five people in her box, I'd put money on not many more people on Court One being in support of Ajla Tomljanovic.
Every point Emma Raducanu scores is being celebrated like she's won the set.
*Raducanu 3-4 Tomljanovic
Raducanu gets things going again after a sharp turnaround and, armed with new balls, moves away from Tomljanovic with a bold second serve for 30-0.
Sam Smith
Former British number one on BBC TV
Highly competitive opening seven games. A little scare for Tomljanovic but it remains on serve.
Martina Navratilova
Nine-time Wimbledon singles champion on BBC TV
The one big difference for me - Emma is the better athlete.
She runs like a deer out there.
*Raducanu 3-4 Tomljanovic
Tomljanovic hauls herself to deuce, and the Australian survives an early setback as Raducanu fires into the net.
Raducanu 3-3 Tomljanovic*
On we go, as Tomljanovic chases another hold to keep her nose in front against Raducanu.
The Briton won't give her an easy ride though, and forces break point!