Chris Bradnam
BBC Sport commentator at Wimbledon

Match point saved. A fitting finale has been reached.

And Serena Williams holds! She scrambles back from match point to take this one to a deciding tie-break.

There was some serious spin on that, and it catches Harmony Tan out. All she can do is frame a forehand low into the net. Advantage Serena Williams.

Centre Court erupts as Serena Williams dinks a forehand into the corner and then follows up to slap away the winner at the net. Deuce. And match point saved.

A couple of big, big strokes from Serena Williams to get Harmony Tan on the move and scramble the point.

That's 30-30. But Tan won't be beaten, she's on the run but keeps getting it back - and Williams slides a volley wide. Match point!

Tan dangles a return high in the Wimbledon sky, it bounces up for Williams to fire down a forehand but she cracks it into the tape. 15-30.

Harmony Tan just couldn't get enough on that sliced backhand. That was a tired effort. Serena Williams attacks a backhand off the next but thumps long and that's 15-15.

Martina Navratilova
Nine-time Wimbledon singles champion on BBC TV

This woman has never been anything like anything this ever, and to hold her nerve and compete with Serena Williams? This is impressive.

And Serena has not played badly but she has not been near the net as much.

Brilliant from Harmony Tan, calmly working Serena Williams around the court and then picking her off at the net with a passing backhand winner to complement the deft drop shot that proceeded it.

She's one game away...

Image source, Getty Images

It's tense. You can sense the edginess in both players' strokes. Serena Williams drives a backhand wide but then responds by leaping all over a slow second serve and hammering down a winner. Deuce.

Oooh. Serena Williams knows she got away with that one, she has the whole court to aim for with a forehand volley and manages to catch the tape on the way through. Harmony Tan dices a delicate slice wide off the next point and Williams can sense another break. But then she hooks a forehand wide! 30-30.

Chris Bradnam
BBC Sport commentator at Wimbledon

Got it! The French resistance continues. This is outstanding.

Boom! What a winner from Harmony Tan. She has Serena Williams at the net, but lashes a backhand beyond the American to break back. That's 5-5.

And now break back point for Harmony Tan! Great scrambling from the 24-year-old, she just keeps making Serena Williams play the ball and eventually she cups one into the tape.

A framer from the American, but it drops inside the baseline and Serena Williams rediscovers her composure to win the point. Harmony Tan steps into the slower second serve this time and her aggressive return is too much for Williams to handle. 30-30.

Serena Williams steps into a backhand but wraps it against the tape, though a slower second outfoxes Harmony Tan on the next point and the Frenchwoman hits the guts of the net. 15-15.

Martina Navratilova
Nine-time Wimbledon singles champion on BBC TV

What a competitor and what a champion. She plays her best tennis when it matters the most.

Box is standing, Venus is going nuts!

And that's the break!

Harmony Tan has the American on the run and should really put away the volley, but it drops into the net and Serena Williams will serve for the match.

The Centre Court crowd are out of their seats.

Martina Navratilova
Nine-time Wimbledon singles champion on BBC TV

Not only does Williams refuse to miss, she comes up with a massive point.

Fantastic stuff.

What. A. Shot! Serena Williams is on her knees after sprinting on to a short ball and coaxing it back over the net, she thinks it's gliding long but it anchors down just in time and she throws both arms in the air. Break point.