A 'come on' from Raducanu welcomes in a fine winner, and the crowd grow into the occasion further as Tomljanovic fails to get a meaningful connection on the teenager's powerful serve.

A true passing shot seals a hold to love!

Anne Keothavong
Former British number one

When you watch her on the court, she brings good energy... the desire is very strong, and she wants it.

Let's keep it real - let her play - let her develop but she's going to be an even better player than we've seen this week.

Raducanu, looking to apply some pressure to the Tomljanovic serve, whacks a forehand into the net to bring the longest rally of the match to a close. 30-15.

Tomljanovic moves on to another satisfactory hold.

There's very little to separate these two so far...

Martina Navratilova
Nine-time Wimbledon singles champion on BBC TV

Maybe it's better to have a dicey hold and your nerves settle down than an easy hold at the start of the match.

Roger Federer on his next opponent, who have yet to finish their fourth-round match: "It is not fair for anyone. I have been in these situations before - but these guys are young and they can recover! Unfortunately they are very, very good too, so hopefully it rains again tomorrow... I'm kidding, I'm kidding!"

A mini fist pump from Raducanu as she moves back on level terms at 15-15, and another as Tomljanovic fails to send the ball back in play from the baseline.

The 18-year-old holds once more as Tomljanovic goes long and it is certainly so far, so good for Raducanu.

Roger Federer, speaking on court: "I heard congratulations at the end of the question - the rest was lost!

"I felt after the first set I was able to control things. I couldn't be more excited to be in the quarters. Thank you guys for coming out and supporting and making it special."

Every time Roger Federer's name is mentioned by the interviewer, she's immediately drowned out by the crowd cheering.

"I can't hear a thing!" he tells her.

Martina Navratilova
Nine-time Wimbledon singles champion on BBC TV

Ajla Tomljanovic is a tough opponent - big hitter, big serve, tough forehand.

Raducanu needs to move her as much as possible, use the angles. If you can make her forward using low balls - that would be my game plan.

Despite the Court One crowd almost entirely against here, Tomljanovic has made an encouraging start in her own first fourth round appearance at a Grand Slam.

The Australian moves to 40-15, but the crowd get excited once more as Tomljanovic nets for 40-30.

Still, she holds, and we remain on serve after three games.

Federer tries to serve and volley and makes a hash of it, gifting Sonego a spot on the board.

Hello! Sonego aims down the line with the backhand, misses, and it's two match points to Federer...

Pow. A wnner, right into the corner of the court, has the crowd purring.

30-0.

Annabel Croft
Former British number one on BBC Radio 5 Live Sports Extra

She's playing in her first Wimbledon - it's quite extraordinary what she's achieved.

Look at her - she's just so joyful on the court.

She has such a complete game for somebody so young.

Perhaps a little over-excited, Raducanu overhits a shot and hands Tomljanovic an early break point.

But there's no panic on the 18-year-old's face, and she completes an important hold as Tomljanovic strikes into the net.

Raducanu on the board.

A brilliant misdirection with the forehand from Federer, and he's 15-0 up.

Here we go...

The two meet at the net, and it's Sonego who wins the tussle.

Roger, you'll have to serve this one out.

Federer almost guides the ball onto his face as he tries to get his backhand behind a serve.

Mind you, he absolutely nails a forehand cross-court to move to 40-30.

Tim Henman
Former British number one on BBC TV

You've really got to do a good job controlling the cotrollables. Raducanu's got a great team around her and she can draw on that experience and not get distracted.