Summary

  • American 15-year-old Coco Gauff beats Russian teenager Anastasia Potapova 3-6 6-2 6-4 in US Open first round

  • British number one Kyle Edmund loses 3-6 7-6 (7-1) 7-5 5-7 6-2 to Spain's Pablo Andujar in the US Open first round

  • Top seed and defending champion Naomi Osaka comes from behind to beat Russia's Anna Blinkova in her opener

  • Three-time US Open champion Rafael Nadal faces Australia's John Millman at 00:00 BST

  • Wimbledon champion Simona Halep beats Nicole Gibbs

  • Use audio icon at the top of the page for BBC Radio 5 Live Sports Extra commentary

Live Reporting

Laura Savvas, Emma Sanders and Saj Chowdhury

  1. Potapova 3-0 Gauff*

    Close but no cigar for Coco as she throws away two break points.

    Potapova goes 3-0 up in the opening set and Coco is left with a sour taste in her mouth.

  2. *Potapova 2-0 Gauff

    Gauff throws away a second break point and we've gone over the six-minute mark in this game now.

  3. *Potapova 2-0 Gauff

    Potapova is making her mark across the court, but a cross-court shot goes against her to give Gauff a break point.

    Her movements aren't the only way she's making her presence known. Potapova is also shouting and making herself heard.

    Deuce.

    Advantage Potapova.

    Back to deuce.

  4. *Potapova 2-0 Gauff

    Potapova makes her fourth challenge in the opening two and half games! She's right too.

    It's 30-30 now at the Louis Armstrong stadium.

  5. Potapova breaks

    *Potapova 2-0 Gauff

    Potapova challenges the call and narrow margins give the 18-year-old a 2-0 lead in the opening set.

  6. Potapova 1-0 Gauff*

    The American seems frustrated as she gets off to a nervy start, but Potapova ends a 17-shot rally by hitting the ball in the net.

    It's not an ideal start for Coco though, who has managed three double faults already.

    Deuce.

  7. Potapova 1-0 Gauff*

    And Potapova is quick off the mark!

    Coco made a challenge early on, but the Russian takes the early lead.

  8. *Potapova 0-0 Gauff

    Here we go!

    Potapova serves to get us under way.

    *Denotes the server.

  9. Here's a quirky lil fact for you all...

    This tie is the youngest first round match-up at the US Open, with a combined age of 33.

    The pair are also two of nine teenagers to feature in this year’s draw.

  10. Gauff v Potapova up next

    Coco Gauff. Headline maker, teenage sensation and 2019 US Open wildcard.

    The 15-year-old’s phenomenal run at Wimbledon bumped her into the world's top 140, and she was handed a wildcard for this competition.

    She reached the fourth round at SW19 and became the youngest woman to reach the second week since Jennifer Capriati in 1991.

    She told the BBC it was “definitely the best week of my life”.

    Can she go one better at Flushing Meadows?

    Her opponent comes in the form of 18-year-old Russian Anastasia Potapova, ranked 72 in the world.

    Anastasia Potapova and Coco GauffGetty Images

  11. 'Every Grand Slam is tough'

    Halep 6-3 3-6 6-2 Gibbs

    Wimbledon champion Simona Halep, after beating American Nicole Gibbs 6-3 3-6 6-2: "I didn't feel like I played against an American today because of you [crowd's support]. I felt I could fight again.

    "She started to play much better in the second set. My energy was lower and I was dominated a little bit. I refreshed my mind and tried to push her a bit more. She played really well.

    "It is not easy. Every Grand Slam is tough. I am really happy that in the third time, I was able to get past the first round. I have lost the last two years here!"

    .Getty Images

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  13. Jonathan Jurejko
    BBC Sport at Flushing Meadows

    All over in four hours and 21 minutes. That's the longest match of the tournament so far. By one minute.

  14. Tennis eh?

    ..
  15. game, set and match

    Game, set and match Andujar

    Edmund 6-3 6-7 (1-7) 5-7 7-5 2-6 Andujar

    Another big serve comes off the frame of Edmund's racquet.

    A sad finish for the Briton who simply seemed to run out of steam.

  16. Edmund 6-3 6-7 (1-7) 5-7 7-5 2-5 Andujar*

    An ace brings up match point for the 33-year-old Spaniard.

  17. Edmund 6-3 6-7 (1-7) 5-7 7-5 2-5 Andujar*

    The Briton then sends a forehand into the net after a mini-rally.

  18. Edmund 6-3 6-7 (1-7) 5-7 7-5 2-5 Andujar*

    Andujar is not showing nerves yet - no snatching at shots in order to get an early winner in the first point.

    15-0.

    15-15.

  19. Edmund 6-3 6-7 (1-7) 5-7 7-5 2-5 Andujar*

    The 24-year-old 30th seed then plays a tired backhand pick-up which finds the bottom of the net.

    He seems resigned to defeat now.

    Sad scenes.

    Andujar to serve for the match.

  20. *Edmund 6-3 6-7 (1-7) 5-7 7-5 2-4 Andujar

    The Briton then makes an error with a double-handed backhand.

    0-40.