Postpublished at 21:43 British Summer Time 12 September 2020
*Osaka 1-5 Azarenka
That's much better from Osaka as she gets over the ball with a double-handed backhand and whips home a winner.
15 all.
Naomi Osaka beats Victoria Azarenka 1-6 6-3 6-3 to win US Open
It is Osaka’s third Grand Slam title
Azarenka was appearing in her first major final since 2013
The final was played behind closed doors on Arthur Ashe Stadium at Flushing Meadows, New York
Saj Chowdhury
*Osaka 1-5 Azarenka
That's much better from Osaka as she gets over the ball with a double-handed backhand and whips home a winner.
15 all.
*Osaka 1-5 Azarenka
It was just a mirage in the desert. Two errors and Osaka will now serve to stay in the set.
Osaka 1-4 Azarenka*
Maybe that drop of the racquet did the trick. At 40-30 she comes to the net and slaps home a volleyed winner.
Deuce.
What's next Naomi?
Naomi Cavaday
BBC Radio 5 Live tennis commentator
This is vintage Azarenka. It is just the sort of tactical match-up she enjoys.
Osaka could make a little bit of a change, she needs to get a bit more on the ball here because I can't see Azarenka letting up.
Osaka 1-4 Azarenka*
Osaka drops her racquet with another unforced error on her forehand. She picks it up with little enthusiasm.
40-15
Osaka 1-4 Azarenka*
The fourth seed has strapping on her left thigh - that hamstring problem that saw her miss the final duel with Azarenka at Cincy - but it doesn't appear to be affecting her running.
Having said that, she is being made to do a heck of a lot of shuttle runs on her side of the court.
Russell Fuller
BBC tennis correspondent
Azarenka is absolutely bossing the final so far.
Osaka 1-4 Azarenka*
Challenge won, but she follows it up with a double fault.
Double break o'clock?
"Yes, it's time," says Azarenka, who sees her opponent fail with her forehand again.
Osaka 1-3 Azarenka*
Yikes! An error on her first serve at 30s each. But it's being challenged...
Naomi Cavaday
BBC Radio 5 Live tennis commentator
It's just that aggressive mindset that Azarenka has got, she's always looking to do as much damage as she can.
It's just not up to Osaka right now, her first serve has been great but it's coming back with interest.
Osaka 1-3 Azarenka*
It sounds strange to say now, but it's difficult to see Azarenka's level drop. It's all about if Osaka can raise her own level.
15-15.
Osaka 1-3 Azarenka*
Azarenka has won every point on her first serve so far - all eight of them! Impressive.
The unseeded player makes it nine with a forehand winner down the line. A scream of delight follows. Appropriate.
The advantage remains two games.
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No joy for Lapthorne in the quads this year. West Ham have just gone behind to Newcastle too...sorry!
Osaka 1-2 Azarenka*
Azarenka swings Osaka about on the first point like someone swinging a bag full of their favourite takeaway.
But Osaka finally finds her range with her serves and forces an error from her opponent to get on the board.
*Osaka 0-2 Azarenka
The Belarusian wins her game to love thanks to some awesome first serves.
Osaka can return like a demon, but isn't quite doing so yet.
Leon Smith
GB Davis Cup captain on BBC Radio 5 Live Sports Extra
Victoria Azarenka looks like a woman on a mission.
Osaka 0-1 Azarenka*
What a peach of a forehand winner up the line from the 31-year-old. The piped in made-for-TV crowd applaud.
15-0.
Osaka 0-1 Azarenka*
One saved but then Osaka sends her forehand long from the baseline.
The Japanese player needs to loosen up fast because her opponent already has.
*Osaka 0-0 Azarenka
Ouch! Double fault for the 22-year-old brings up two break points.
Vika?
*Osaka 0-0 Azarenka
A decent rally to start things off with Osaka punching her forehand into the bottom of the net.
First blood Azarenka.