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LIVE: Serena Williams beats Anett Kontaveit 7-6 (7-4) 2-6 6-2 to reach third round
Victory prolongs American's farewell before impending retirement
LIVE: Briton Jack Draper faces Canadian sixth seed Felix Auger-Aliassime in second round
Earlier: Andy Murray beats Emilio Nava 5-7 6-3 6-1 6-0 to reach third round
Britain's Harriet Dart loses 6-4 6-0 to Hungary's Dalma Galfi
Britain's Joe Salisbury and American Rajeev Ram make winning start to their men's doubles title defence
*Galfi 1-0 Dart
Not the start Harriet Dart will have been wanting, as she sees her serve broken in the very first game.
It was a very easy love hold for Dalma Galfi. The Hungarian has heavy strapping on her left leg but it doesn't seem to be causing her issues at the moment.
Murray 5-7 6-3 6-1 4-0 Nava*
Naomi Broady
British player on BBC Radio 5 Live
I would be very curious to see the racquet head speed for Murray. I would imagine it is quicker, and it is just taking the time away from Nava. Has he got quicker because Nava has dropped his level or was it Murray who made the first move?
Murray 5-7 6-3 6-1 4-0 Nava*
Murray pumps his fist in celebration as Nava bats the ball long to give the Brit another hold.
He is two games away from winning this match, but Nava put up more of a fight in that one.
Galfi 0-0 Dart*
Harriet Dart to get us under way on court 12.
Only once before has she reached the third round of a Grand Slam, coming at Wimbledon in 2019. Does another third round berth beckon here?
*Murray 5-7 6-3 6-1 3-0 Nava
Obviously it's not over yet, but if Andy Murray wins this one he will face either Italian 13th seed Matteo Berrettini or French world number 119 Hugo Grenier next.
Like Murray, Berrettini lost the first set of that match but leads 2-1 now.
In this match, Murray is at 30-30 on his serve.
*Murray 5-7 6-3 6-1 3-0 Nava
Naomi Broady
British player on BBC Radio 5 Live
It's that cushion isn't it. Andy trying to get that lead just in case Nava gets a second win.
*Murray 5-7 6-3 6-1 3-0 Nava
There's not long left of this, surely.
Nava stumbles as he tries to reach a backhand and it only goes into the net.
Murray 5-7 6-3 6-1 2-0 Nava*
Despite his dominance, Andy Murray will still berate himself for any mistake. He whacks the ball wide and loudly vocalises his annoyance.
Maybe it's that attitude which helps him claw his way to 30-30 on Nava's serve.
Another break here would be devestating for the American, but it could be on the cards. Murray hustles, covering pretty much the whole of the court chasing balls, and it comes good as he sets up another break point.
Galfi v Dart
Naomi Broady
British player on BBC Radio 5 Live
I think Harriet loves the big stage - she has always played well at the Grand Slams. She has qualified so many times and she has always been good at stepping up.
She has a lot of self-belief. Now the question is to back up that first-round big win.
Galfi v Dart
After a long old wait for the men's match preceding hers to finish - it went all the way to a fifth-set tie-break - it's finally time for Harriet Dart to emerge onto court 12.
After stunning 10th seed Daria Kasatkina in the first round, she takes on Hungary's Dalma Galfi for the first time today.
Should she win, she'll replace Emma Raducanu as British number one.
Image source, Getty ImagesMurray 5-7 6-3 6-1 2-0 Nava*
"Vamos," comes the call from Nava's coach. He's not giving up on this one yet.
The player's body language says different though as he hauls another ball into the net to go 40-0 down.
Murray nets himself, but claims his hold on the next point.
*Murray 5-7 6-3 6-1 1-0 Nava
Demonstrating Naomi's point, Andy Murray has won 17 of the last 20 points.
He is in control now.
*Murray 5-7 6-3 6-1 1-0 Nava
Naomi Broady
British player on BBC Radio 5 Live
You cannot make up for experience. The top players have been in every single situation, especially the ones who have won Grand Slams.
Murray didn't looked panicked when he lost the first set. And I felt the same. You just knew that Nava could not sustain such a high level of tennis.
*Murray 5-7 6-3 6-1 1-0 Nava
Emilio Nava looks to the sky in frustration as he hooks a backhand wide to give Andy Murray and early break.
Murray 5-7 6-3 6-1 0-0 Nava*
Oh dear, could this be over quite soon?
The fourth set has barely begun and already Murray has two break points.
Murray 5-7 6-3 6-1 0-0 Nava*
It took an hour and 24 minutes for Emilio Nava to take the first set.
In the hour and 11 minutes since, Andy Murray has won two.
The former champion is within touching distance of his first Grand Slam third round in over a year.
Murray 5-7 6-3 6-1 0-0 Nava*
Nava's return lands out and that's a 2-1 lead for Andy Murray.
He lost the first set, but has been largely unthreatened since.
*Murray 5-7 6-3 5-1 Nava
Within seconds, Murray is already 40-0 up.
*Murray 5-7 6-3 5-1 Nava
Naomi Broady
British player on BBC Radio 5 Live
I think even though Nava got the first set, it still took him an hour and 24 minutes. It will have taken so much energy out of both of them.
*Murray 5-7 6-3 5-1 Nava
He only needs one.
Another perfect drop-shot from Murray puts him two breaks up. Surely this third set is his now.