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. Around the courts

    Let's take you to Louis Armstrong first where Greek eighth seed Stefanos Tsitsipas is not having the best time of it - he's a set and was a break down to Russian world number 43 Andrey Rublev.

    It's now 4-4 and going on serve.

    Wimbers semi-finalist and seemingly all-around nice guy Roberto Bautista-Agut is 1-1 all against Kazakh Mikhail Kukushkin.

    On Grandstand Alison Riske, who got to the SW19 quarters, is a set down to Spanish Grand Slam winner Garbine Muguruza - though she is a break up in the second.

  2. Is Alexander Zverev the new Thomas Muller?

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  3. Blinkova breaks

    Osaka 0-2 Blinkova*

    Hmm, Blinkova moves into the net and Osaka misses the pass. Two break points!

    The Russian only needs one, aggressively returning a forehand to move 2-0 up. Work to do for the defending champ...

  4. *Osaka 0-1 Blinkova

    Naomi Osaka puts pressure on Anna Blinkova's serve in the opening game, taking her to deuce.

    But the Russian holds as we get well and truly under way on Arthur Ashe.

  5. Jonathan Jurejko
    BBC Sport at Flushing Meadows

    US OpenBBC Sport

    As you walk in the south gate at the Billie Jean King Tennis Center, with Ashe looming in front and the iconic Unisphere behind, you are greeted by the 'Court of Champions'.

    This is a modernist concrete wall with the images of 25 of the sport's greatest players, including Arthur Ashe himself, inducted by the USTA.

    Naomi Osaka isn't on there. Yet. But the defending champion's name has, of course, been etched into the bronze roll of honour on the next wall.

    US OpenBBC Sport

  6. 'I think it's looking good'

    Osaka v Blinkova

    Naomi OsakaRex Features

    Now then.

    World number one Osaka is first up - the holder and Aussie Open champ - hasn't actually appeared in a final since Melbourne!!!

    Anyway, she recently suffered a knee injury that forced her to retire with a knee injury during the last-eight stage in Cincinnati.

    So Naomi, how goes it?

    "It's getting better. I have been playing more, [and] longer every day," Osaka said about her injury. "It's feeling better. Luckily I'm a fast healer, so I think it's looking good."

  7. Kyle to make it three?

    Edmund v Andujar

    Kyle EdmundRex Features

    We've seen both Jo Konta and Dan Evans progress to round two, so it's now down to British number one Kyle Edmund to make it the 'Terrific Three' instead of just the...er... 'Terrific Two'.

    His match against Spaniard Pablo Andujar begins soon and we will have live text commentary.

    We will also have regular updates on US Open champion Naomi Osaka's match against Russian Anna Blinkova.

    You can listen to BBC Five Live Sports Extra coverage now from Flushing Meadows.