Day one of US Open in New York
Defending champion Aryna Sabalenka beats Rebeka Masarova 7-5 6-1
World number one Sabalenka seeking first major of year
Emma Raducanu drops just three games against Ena Shibahara to reach second round
First time Raducanu has gone past first round at Flushing Meadows since 2021 title run
Home hopes Taylor Fritz and Ben Shelton through; Novak Djokovic and Jessica Pegula in night session
*Mensik 0-1 Jarry
16th seed Jakub Mensik has just begun his first round match against Nicolas Jarry of Chile.
Mensik won his first ATP Tour title back in March, beating Novak Djokovic in the final of the Miami Open.
Jarry is ranked 102 in the world.
Raducanu v Shibahara
Jonathan Jurejko
BBC Sport senior tennis reporter at Flushing Meadows
Sometimes you laugh incredulously to yourself when remembering what Emma Raducanu did here four years ago.
It was so extraordinary it feels beyond belief.
Around Flushing Meadows there are plenty of reminders what the 22-year-old Brit achieved as a teenage qualifier.
Image source, BBC SportOn the way into the South Gate entrance of the Billie Jean King Tennis Center, you are immediately greeted by a bronze-plated honours board of the previous champions.
And in the bowels of Arthur Ashe Stadium, one of the corridors close to the players area is lined with iconic photographs of the recent singles winners.
Raducanu will be remembered here in perpetuity and always reminded of her stunning achievement when she returns.
Image source, BBC SportBritish number one Emma Raducanu emerges at the Louis Armstrong stadium, slightly behind Japanese opponent Ena Shibahara.
Jonathan Jurejko
BBC Sport senior tennis reporter at Flushing Meadows
Image source, BBC SportGood morning New York City!
This part of Manhattan turns into tennis town when the US Open returns.
The Midtown area is the business, commercial and tourist hub of the City That Never Sleeps - although it is, ironically, pretty dozy on a quiet Sunday morning.
It is easy to spot the tennis folk milling around - players, coaches, officials and media all grabbing their morning coffees.
Then it is a case of jumping on buses out to Flushing Meadows, which is about eight kilometres away in Queen's, for the first Sunday start in the tournament's history.
It's four years since Emma Raducanu stunned the tennis world by winning the US Open at the age of 18.
The Brit doesn't need reminding that she's struggled to hit those heights since, with Raducanu failing to win a single match at Flushing Meadows in the four following years.
But there have been green shoots of recovery in Raducanu's game this season and the world number 35 no longer fears returning to New York.
"I really struggled when I came back in 2022. I didn't enjoy coming back here," said Raducanu.
"I think now is the first time that I feel like I can come back to the US Open and really enjoy the memories that I made here.
"I can be proud of that and see it as a happy place.
"So for that, I feel very grateful for and very pleased about. So I feel in a much better place now."
Former US Open champion Emma Raducanu leads the British charge today.
We'll be keeping you up to date with the 22-year-old's match against Ena Shibahara.
In the men's draw, Taylor Fritz will be hoping for a confident start on home soil when the American takes on compatriot Emilio Nava at 18:00 BST.
Before that, it's fellow American Ben Shelton, who will be looking to build on his Canadian Open success against Peru's Ignacio Buse.
It's day one of the US Open in Flushing Meadows.
I know what you're thinking, isn't it Sunday?
Yes it is, welcome to the 15-day US Open!
